| 回避策あり | Public Holiday Calendars Missing Dates After June 2026 in Outlook Outlook Known issues in September 2026 updates | 2026-10-16 |
| 解決 | Copilot buttons are missing in classic Outlook for Windows Outlook Known issues in October 2026 updates | 2026-10-15 |
| 解決 Fix In Progress | Classic Outlook issues with service assisted search for shared mailboxes Outlook Known issues in October 2026 updates
経過: Investigating → Fix In Progress（10-06） | 2026-09-29 |
| 解決 | How to revert the Outlook Desktop WebView based Room Finder to the legacy Room Finder Outlook Known issues in September 2026 updates | 2026-09-17 |
| 解決 | Known issues with classic Outlook Desktop Shared Calendar Improvements Outlook Known issues in October 2025 updates | 2026-07-22 |
| 解決 | Copilot Draft fails in classic Outlook with error "Sorry, something went wrong. Copilot is working on it." Outlook Known issues in May 2026 updates | 2026-05-28 |
| 解決 | Quick Steps are grayed out in classic Outlook when they contain actions that can’t be fulfilled Outlook Known issues in May 2026 updates | 2026-05-11 |
| 解決 | Office document links opened in classic Outlook might appear to be blank or open with an error Outlook Known issues in May 2026 updates | 2026-05-01 |
| 解決 | Outlook 2024 LTSC crashes opening Viva Engage, Yammer, Power Automate, and other emails Outlook Known issues in May 2026 updates | 2026-05-01 |
| 解決 | Auto Translate stopped working in classic Outlook Outlook Known issues in April 2026 updates | 2026-04-30 |
| 解決 | Outlook on premise Exchange web add-ins stopped loading after updating to Version 2603 Outlook Known issues in April 2026 updates | 2026-04-21 |
| 解決 | Classic Outlook error when sending from Outlook.com "You do not have permission to send on behalf of the specified user 0x80070005-0x0004dc-0x000524." Outlook Known issues in April 2026 updates | 2026-04-03 |
| 解決 | My Templates are missing from Outlook Outlook Known issues in April 2026 updates | 2026-04-03 |
| 解決 | Classic Outlook crashes and opens in Safe Mode starting March 12 2026 Outlook Known issues in March 2026 updates | 2026-03-27 |
| 解決 | Users get errors 0x800CCC0E & 0x800CCC0F synchronizing Gmail and Yahoo accounts in classic Outlook Outlook Known issues in March 2026 updates | 2026-03-23 |
| 解決 | Users might get the error "This is not a valid style name" in classic Outlook Outlook Known issues in March 2026 updates | 2026-03-10 |
| 調査中 | Users may get the error "Can't connect to the server" when creating groups in classic Outlook Outlook Known issues in March 2026 updates | 2026-03-09 |
| 解決 | Classic Outlook replaces accented and extended characters with question marks Outlook Known issues in March 2026 updates | 2026-03-06 |
| 調査中 | Mouse pointer disappears when hovering over classic Outlook Outlook Known issues in February 2026 updates | 2026-02-27 |
| 解決 | Classic Outlook recipients are unable to open "Encrypt Only" emails Outlook Known issues in February 2026 updates | 2026-02-19 |
| 調査中 | Users get error "There was an error reading the rules from the server" after making changes to rules in classic Outlook Outlook Known issues in February 2026 updates | 2026-02-17 |
| 仕様 | Users might get an error applying an encrypted sensitivity label when replying to an encrypted message sent from an external organization Outlook Known issues in February 2026 updates | 2026-02-13 |
| 調査中 | Users may experience an error when updating a meeting in their own or a shared calendar Outlook Known issues in February 2026 updates | 2026-02-05 |
| 解決 | Classic Outlook adds table borders to signatures after updating to Version 2512 Outlook Known issues in February 2026 updates | 2026-02-03 |
| 解決 | Classic Outlook profiles with POP accounts and PSTs hang after Windows updates on January 13, 2026 Outlook Known issues in February 2026 updates | 2026-02-03 |
| 回避策あり | Error opening encrypted emails from classic Outlook: "Configuring your computer for Information Rights Management" Outlook Known issues in January 2026 updates | 2026-01-09 |
| 解決 | Unable to report meeting items as junk in classic Outlook Outlook Known issues in January 2026 updates | 2026-01-07 |
| 解決 | Classic Outlook shows error "Contacting the server for information" Outlook Known issues in December 2025 updates | 2025-12-17 |
| 解決 | Error “The text formatting command is not available” when opening emails in classic Outlook or documents in Word for Windows Outlook Known issues in December 2025 updates | 2025-12-17 |
| 解決 | Contact Groups created from Outlook contacts get added with /o=ExchangeLabs Outlook Known issues in December 2025 updates | 2025-12-16 |
| 解決 | Attaching a OneDrive file through a web add-in causes recipient access errors in classic Outlook Outlook Known issues in November 2025 updates | 2025-11-14 |
| 解決 | Error opening classic Outlook: "Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The attempt to log on to Microsoft Exchange has failed." Outlook Known issues in October 2025 updates | 2025-10-20 |
| 解決 | Classic Outlook cannot open a shared calendar with a contact created from the Global Address List Outlook Known issues in September 2025 updates | 2025-09-23 |
| 解決 | Classic Outlook Contacts that have an X509 S/MIME certificate added to the Global Address List can no longer be edited with Operation Failed error Outlook Known issues in September 2025 updates | 2025-09-23 |
| 解決 | The Edit Contact button stopped working with Version 2507 in classic Outlook Outlook Known issues in September 2025 updates | 2025-09-12 |
| 解決 | Classic Outlook jumps in the message list when clicking an email or scrolling Outlook Known issues in September 2025 updates | 2025-09-10 |
| 解決 | Cannot open the Automatic Replies setting of a shared mailbox in Classic Outlook Outlook Known issues in September 2025 updates | 2025-09-09 |
| 回避策あり | The "Join" button opens a wrong URL in recurring Zoom meetings in Outlook Outlook Known issues in September 2025 updates | 2025-09-09 |
| 解決 | Outlook desktop alert notifications open behind other applications Outlook Known issues in September 2025 updates | 2025-09-04 |
| 回避策あり | Error code 30094-27 when updating Office Outlook Known issues in August 2025 updates | 2025-08-28 |
| 仕様変更・廃止 | Outlook Today and Folder Home Pages deprecation Outlook Known issues in August 2025 updates | 2025-08-27 |
| 解決 | Error when opening a saved .MSG file twice in classic Outlook Outlook Known issues in August 2025 updates | 2025-08-11 |
| 仕様変更・廃止 | Custom form script is now disabled by default Outlook Known issues in July 2025 updates | 2025-07-24 |
| 解決 | Certain users enrolled in the Microsoft 365 Insiders Program cannot launch classic Outlook for Windows Outlook Known issues in July 2025 updates | 2025-07-21 |
| 解決 | Classic Outlook crashes opening or starting a new email Outlook Known issues in July 2025 updates | 2025-07-10 |
| 解決 | Classic Outlook Copilot Chat appears available for GCC-M users, when the license is unassigned or the app is blocked Outlook Known issues in July 2025 updates | 2025-07-03 |
| 解決 | Opening SMIME signed OME protected email causes error “You have changed this message” Outlook Known issues in June 2025 updates | 2025-06-26 |
| 解決 | Shared mailbox folders flicker and move around when trying to move items to the folders Outlook Known issues in June 2025 updates | 2025-06-18 |
| 回避策あり | Outlook Desktop Me Control account manager does not sign in for on premise users running in a hybrid environment Outlook Known issues in June 2025 updates | 2025-06-11 |
| 解決 | When trying to sign in to an Office app, users might receive a consent dialog labeled AugLoop.All (TEST Augmentation Loop MSIT) Outlook Known issues in June 2025 updates | 2025-06-06 |
| 調査中 | Text predictions unexpectedly become unavailable and are missing in Outlook options Outlook Known issues in May 2025 updates | 2025-05-20 |
| 解決 | Errors CAA2000B and 4usqa when trying to sign in to classic Outlook Outlook Known issues in May 2025 updates | 2025-05-14 |
| 解決 | CPU spikes when typing in classic Outlook for Windows Outlook Known issues in May 2025 updates | 2025-05-12 |
| 解決 | Classic Outlook mail merge hangs trying to initialize Word Outlook Known issues in May 2025 updates | 2025-05-01 |
| 解決 | Outlook Calendars render blank sections in Calendar View Outlook Known issues in April 2025 updates | 2025-04-28 |
| 解決 | The paste special shortcut Ctrl+Alt+V stopped working in classic Outlook Outlook Known issues in April 2025 updates | 2025-04-28 |
| 解決 | Classic Outlook display language is English only when installed via standalone download Outlook Known issues in April 2025 updates | 2025-04-24 |
| 解決 | Classic Outlook jumps when scrolling Newsletter emails Outlook Known issues in April 2025 updates | 2025-04-24 |
| 解決 | Users may notice that the incorrect timeslot is selected after clicking a meeting in the Calendar Outlook Known issues in April 2025 updates | 2025-04-23 |
| 解決 | Word, Excel, or Outlook might stop responding after installing the KB5002700 security update for Office 2016 Outlook Known issues in April 2025 updates | 2025-04-10 |
| 解決 | Classic Outlook errors on startup "The required file msls70.dll cannot be found in your path" Outlook Known issues in March 2025 updates | 2025-03-31 |
| 回避策あり | Outlook icon on the Start menu is not updated to Outlook (classic) Outlook Known issues in March 2025 updates | 2025-03-10 |
| 解決 | Unable to drag and drop emails to folders in classic Outlook Outlook Known issues in February 2025 updates | 2025-02-25 |
| 解決 | Advanced Typography settings are missing in classic Outlook and Word Outlook Known issues in February 2025 updates | 2025-02-24 |
| 調査中 | Outlook 2016 MSI is not showing sender in search results Outlook Known issues in February 2025 updates | 2025-02-05 |
| 解決 | Classic Outlook hangs when using the Copy shortcut Outlook Known issues in January 2025 updates | 2025-01-21 |
| 解決 | Classic Outlook and Microsoft 365 applications crashing on Windows Server 2016 Outlook Known issues in January 2025 updates | 2025-01-17 |
| 回避策あり | Classic Outlook crashes on reply and forward Outlook Known issues in January 2025 updates | 2025-01-17 |
| 解決 | Page Title is blank when you send a meeting from classic Outlook to OneNote Outlook Known issues in January 2025 updates | 2025-01-08 |
| 解決 | Unable to add a Gmail account to classic Outlook Outlook Known issues in January 2025 updates | 2025-01-07 |
| 仕様 | The dismiss option is no longer available for mentions and reactions in the Outlook Notifications pane Outlook Known issues in April 2024 updates | 2024-11-15 |
| 解決 | Classic Outlook Report button not removed after setting "Use a non-Microsoft add-in button" Outlook Known issues in November 2024 updates | 2024-11-14 |
| 解決 | Signatures are not syncing between Outlook Desktop and Outlook Web App Outlook Known issues in November 2024 updates | 2024-11-06 |
| 回避策あり | Classic Outlook errors opening more than sixty emails at the same time Outlook Known issues in November 2024 updates | 2024-11-04 |
| 解決 | Outlook blocks copying meetings with "Copying meetings is not supported." Outlook Known issues in October 2024 updates | 2024-10-25 |
| 解決 | Outlook Junk filtering is running but the Junk Email Options settings are removed Outlook Known issues in October 2024 updates | 2024-10-18 |
| 解決 | Classic Outlook reminders dialog not drawing properly and Dismiss button missing Outlook Known issues in October 2024 updates | 2024-10-10 |
| 解決 | Outlook Desktop is unable to apply labels with encryption Outlook Known issues in October 2024 updates | 2024-10-08 |
| 解決 | Emails sent using Outlook Desktop results in Non-Delivery Report [0x80040305-0x00000000-0x00000000] Outlook Known issues in September 2024 updates | 2024-09-30 |
| 調査中 | Admins cannot enforce specific settings Outlook Known issues in September 2024 updates | 2024-09-25 |
| 調査中 | Meeting request is missing from organizers calendar Outlook Known issues in July 2024 updates | 2024-09-12 |
| 解決 | Unable to sign in or add a Gmail account to classic Outlook Outlook Known issues in September 2024 updates | 2024-09-10 |
| 解決 | Outlook, Word, or OneNote unexpectedly close when typing Outlook Known issues in September 2024 updates | 2024-09-09 |
| 解決 | Outlook prompts security notice opening .ICS files after installing protections for Microsoft Outlook Information Disclosure Vulnerability released: Dec 12, 2023 Outlook Known issues in August 2024 updates | 2024-08-30 |
| 解決 | Print to PDF is blocked if Mandatory Labeling is enabled Outlook Known issues in August 2024 updates | 2024-08-26 |
| 回避策あり | Classic Outlook unexpectedly closes at start up on faulting module ucrtbase.dll Outlook Known issues in August 2024 updates | 2024-08-16 |
| 解決 Resolution | Teams Meeting add-in is missing in Outlook Desktop after updating to New Teams Outlook Known issues in August 2024 updates | 2024-08-06 |
| 解決 | Outlook email is delayed while a web add-in is working on the send request Outlook Known issues in June 2024 updates | 2024-08-01 |
| 解決 | Outlook shows conflict errors when updating or cancelling meetings Outlook Known issues in July 2024 updates | 2024-07-18 |
| 回避策あり | Unable to open a shared calendar in Outlook Desktop Outlook Known issues in July 2024 updates | 2024-07-17 |
| 回避策あり | Outlook error "The operation failed" if the message has a retention policy Outlook Known issues in June 2024 updates | 2024-06-28 |
| 仕様 | Error when selecting Scheduling Poll in Outlook for Windows Outlook Known issues in June 2024 updates | 2024-06-27 |
| 解決 | Error replying to encrypted emails from Outlook Desktop Outlook Known issues in June 2024 updates | 2024-06-21 |
| 調査中 | Error when opening calendar events in a Room mailbox from Scheduling Assistant Outlook Known issues in June 2024 updates | 2024-06-20 |
| 回避策あり | Outlook sync issues cause emails to be stuck in the Outbox and undeliverable mail items Outlook Known issues in June 2024 updates | 2024-06-20 |
| 回避策あり | Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps Outlook Known issues in June 2024 updates | 2024-06-10 |
| 解決 | Outlook Desktop calendar Out of Office color indicator unexpectedly changed Outlook Known issues in June 2024 updates | 2024-06-04 |
| 解決 | Outlook Desktop cannot load the contact card and gets stuck at "Loading" Outlook Known issues in May 2024 updates | 2024-05-16 |
| 解決 | Outlook Desktop is slow to save attachments to a network path Outlook Known issues in May 2024 updates | 2024-05-14 |
| 仕様 | Contacts in the Outlook Address Book are listed multiple times Outlook Known issues in May 2024 updates | 2024-05-13 |
| 解決 | Outlook replies or forwards cause non-delivery error "Your message did not reach some or all of the intended recipients" Outlook Known issues in March 2024 updates | 2024-03-29 |
| 解決 | Unable to send emails from QuickBooks using Outlook Desktop after update to Version 2402 Outlook Known issues in March 2024 updates | 2024-03-27 |
| 仕様 | Outlook Desktop error with Advanced Find when searching online archive with auto-expanding folders Outlook Known issues in March 2024 updates | 2024-03-19 |
| 解決 | Unable to edit Contacts, Appointments, Meetings, or Tasks within Outlook Outlook Known issues in March 2024 updates | 2024-03-18 |
| 解決 | VoiceMail forms do not work in Outlook Desktop Outlook Known issues in March 2024 updates | 2024-03-18 |
| 仕様変更・廃止 | Inserting a link as an attachment has changed in Outlook Desktop Outlook Known issues in March 2024 updates | 2024-03-05 |
| 解決 | Outlook Desktop Exchange ActiveSync connections stopped working in Version 2401 Outlook Known issues in February 2024 updates | 2024-02-29 |
| 解決 | Characters converted to Kanji become invisible in Word and Outlook Outlook Known issues in February 2024 updates | 2024-02-27 |
| 回避策あり | Outlook and other apps are unable to connect to Outlook.com when using Basic authentication Outlook Known issues in February 2024 updates | 2024-02-27 |
| 解決 | SharePoint nested folder links in Outlook Desktop open to the root folder Documents Outlook Known issues in February 2024 updates | 2024-02-14 |
| 解決 | Outlook unexpectedly has an App Search bar above the message list Outlook Known issues in February 2024 updates | 2024-02-13 |
| 解決 | Searching Current Folder of an auto-mapped shared mailbox in Outlook Desktop returns no results or results from other folders Outlook Known issues in January 2024 updates | 2024-01-23 |
| 解決 | Outlook error "Cannot move the items" when moving items to other folders Outlook Known issues in January 2024 updates | 2024-01-09 |
| 回避策あり | Outlook starts up slowly and hangs at splash screen when REST to MAPI is unexpectedly toggled Outlook Known issues in January 2024 updates | 2024-01-04 |
| 解決 Resolution | Outlook blocks opening FQDN and IP address hyperlinks after installing protections for Microsoft Outlook Security Feature Bypass Vulnerability released July 11, 2023 Outlook Known issues in December 2023 updates | 2023-12-11 |
| 解決 Resolution | Images are blocked and meeting body is read only in Outlook Desktop if calendar items are from external senders for Microsoft Outlook Spoofing Vulnerability released August 8, 2023 Outlook Known issues in November 2023 updates | 2023-11-30 |
| 解決 | Outlook Desktop crashes sending an email from Outlook.com accounts Outlook Known issues in November 2023 updates | 2023-11-30 |
| 解決 | Office file links and attachments in Outlook Desktop show to be in Protected View but do not open Outlook Known issues in November 2023 updates | 2023-11-29 |
| 調査中 | Error "Something Went Wrong [1001]" signing in to Microsoft 365 Desktop Applications Outlook Known issues in November 2023 updates | 2023-11-17 |
| 解決 | Outlook Desktop signature auto enters when typing an email Outlook Known issues in November 2023 updates | 2023-11-10 |
| 解決 | Outlook errors "Cannot send this item." replying to an email Outlook Known issues in November 2023 updates | 2023-11-10 |
| 解決 | Error when opening Actionable Messages Outlook Known issues in November 2023 updates | 2023-11-01 |
| 回避策あり | Quick Print stops printing PDF attachments in Outlook Desktop Outlook Known issues in October 2023 updates | 2023-10-24 |
| 解決 | Unable to view private items in a shared calendar using MAPI in cached mode in Outlook Outlook Known issues in October 2023 updates | 2023-10-16 |
| 仕様変更・廃止 | Weather is no longer displayed on the Calendar in Outlook Outlook Known issues in October 2023 updates | 2023-10-04 |
| 解決 | Outlook unexpectedly prompts to reopen items from your last session Outlook Known issues in September 2023 updates | 2023-09-28 |
| 解決 | Outlook prompts "Retrieving templates from server" after selecting the From field drop down Outlook Known issues in July 2023 updates | 2023-09-12 |
| 解決 | Script Error in Outlook when clicking "Microsoft Office Online" from the Shortcuts function Outlook Known issues in September 2023 updates | 2023-09-11 |
| 解決 | Outlook Desktop crashes sending a meeting invite that includes a Loop component Outlook Known issues in September 2023 updates | 2023-09-06 |
| 解決 | How to add a Yahoo IMAP account to Outlook Desktop without an App Password Outlook Known issues in August 2023 updates | 2023-08-11 |
| 解決 | Unable to add a Poll to emails in Outlook Desktop Outlook Known issues in August 2023 updates | 2023-08-01 |
| 解決 | Outlook errors printing tasks or contacts that exceed a page in length Outlook Known issues in July 2023 updates | 2023-07-12 |
| 回避策あり | Can't create a Teams Meeting in Outlook because the Teams Meeting add-in has become disabled Outlook Known issues in January 2023 updates | 2023-05-25 |
| 回避策あり | Outlook for Windows doesn't show all owners of a distribution group Outlook Known issues in May 2023 updates | 2023-05-25 |
| 調査中 | Touch mode does not work when using hosted applications in Outlook Desktop Outlook Known issues in May 2023 updates | 2023-05-24 |
| 解決 | Outlook unexpectedly opens a browser window if OWA is disabled Outlook Known issues in May 2023 updates | 2023-05-18 |
| 解決 | Microsoft 365 group users may be unable to view or access group calendars and email messages in Outlook Desktop Outlook Known issues in April 2023 updates | 2023-04-25 |
| 回避策あり | When creating a Quick Step for New E-mail To, Outlook does not save it Outlook Known issues in April 2023 updates | 2023-04-24 |
| 解決 | Incorrect or no results when searching auto-expanding archives in Outlook Outlook Known issues in April 2023 updates | 2023-04-17 |
| 解決 | No results when searching in Outlook with Suggested Searches for specific queries Outlook Known issues in April 2023 updates | 2023-04-17 |
| 解決 | Can't sign in to Outlook with Outlook.com account Outlook Known issues in March 2023 updates | 2023-03-28 |
| 解決 | Calendar Week search switches from List View to Agenda Summary View Outlook Known issues in March 2023 updates | 2023-03-21 |
| 解決 | Calendar events missing in Scheduling Assistant Outlook Known issues in March 2023 updates | 2023-03-17 |
| 解決 | Problems syncing shared calendars when enabling "Can view title and location" permissions Outlook Known issues in March 2023 updates | 2023-03-09 |
| 解決 | Unable to dismiss shared calendar reminders for Outlook.com accounts in Outlook Desktop Outlook Known issues in February 2023 updates | 2023-02-15 |
| 解決 | Duplicate shared Calendar(s) after transitioning between Mail and Calendar modules Outlook Known issues in February 2023 updates | 2023-02-13 |
| 回避策あり | Extending an all-day event on a shared calendar unexpectedly shortens or lengthens the event Outlook Known issues in February 2023 updates | 2023-02-13 |
| 解決 | No results when searching with the built-in ‘Received' filter in Outlook Outlook Known issues in February 2023 updates | 2023-02-08 |
| 解決 | Flickering observed in Outlook Calendar while scrolling Outlook Known issues in February 2023 updates | 2023-02-07 |
| 回避策あり | Unable to use the undo keyboard shortcut with hosted applications in Outlook Desktop Outlook Known issues in December 2022 updates | 2022-12-05 |
| 回避策あり | Can't move searched items to other folders beyond the sync slider limit Outlook Known issues in December 2022 updates | 2022-12-02 |
| 回避策あり | Can't configure Exchange Online mailbox in Outlook Desktop Outlook Known issues in October 2022 updates | 2022-10-27 |
| 解決 | Outlook cannot display contacts in People View Outlook Known issues in October 2022 updates | 2022-10-17 |
| 回避策あり | Outlook closes shortly after it is opened Outlook Known issues in October 2022 updates | 2022-10-05 |
| 回避策あり | Outlook IMAP or POP server unexpectedly terminated the connection, and the server was interrupted Outlook Known issues in October 2022 updates | 2022-10-05 |
| 回避策あり | Users can't print translated content in Outlook Outlook Known issues in September 2022 updates | 2022-09-30 |
| 解決 | Junk email messages multiplying without user actions in Shared Mailboxes Outlook Known issues in September 2022 updates | 2022-09-29 |
| 解決 | Shared mailbox is not automatically refreshing for new email in Outlook Outlook Known issues in September 2022 updates | 2022-09-13 |
| 解決 | Outlook stops responding when viewing Uber receipt emails and some other emails with tables Outlook Known issues in August 2022 updates | 2022-08-09 |
| 解決 | Internet connectivity issues in M365 apps after a change to the IP address range Outlook Known issues in July 2022 updates | 2022-08-08 |
| 解決 | Outlook Search might not display recent emails on Windows 11 Outlook Known issues in July 2022 updates | 2022-07-25 |
| 回避策あり | Delegate can view their Manager Online Archive Calendar in Outlook and Private Items in Online Archive Mailbox Outlook Known issues in July 2022 updates | 2022-07-25 |
| 解決 | Outlook 2019 sender email address missing on reply and forwards Outlook Known issues in June 2022 updates | 2022-07-19 |
| 解決 | Outlook hosted application displays incorrect or missing information Outlook Known issues in July 2022 updates | 2022-07-15 |
| 調査中 | Shorten Appointments and Meetings settings for Outlook might appear greyed out Outlook Known issues in July 2022 updates | 2022-07-11 |
| 解決 | Incorrect or no results when searching the Online Archive of a Full Access mailbox Outlook Known issues in June 2022 updates | 2022-06-15 |
| 回避策あり | Error 'This web browser does not support JavaScript or scripts are being blocked' when adding a Google Workspace account Outlook Known issues in May 2022 updates | 2022-05-26 |
| 解決 | Blank room lists in Room Finder for GCC Tenants Outlook Known issues in April 2022 updates | 2022-05-12 |
| 回避策あり | Error expanding Contact Group in Outlook Desktop Outlook Known issues in April 2022 updates | 2022-05-09 |
| 解決 | Outlook error creating Teams meeting "Sorry, you need to sign out of Teams and sign in again before you can schedule your meeting" Outlook Known issues in April 2022 updates | 2022-04-15 |
| 解決 | Conflicts in Outlook task Outlook Known Issues in October 2021 updates | 2022-04-11 |
| 回避策あり | Outlook errors "Not Implemented" when Reply All to email on ARM devices Outlook Known issues in April 2022 updates | 2022-04-08 |
| 解決 | Outlook Search not showing recent emails after Windows update KB5008212 Outlook Known Issues in December 2021 updates | 2022-04-06 |
| 解決 | Outlook stops connecting to Windows 7 and legacy Windows Server versions Outlook Known issues in March 2022 updates | 2022-03-18 |
| 回避策あり | Outlook PDF preview error: This file cannot be previewed because there is no previewer installed for it Outlook Known issues in March 2022 updates | 2022-03-18 |
| 解決 | Outlook crash when using "Find Related" search feature in the Tasks Module Outlook Known Issues in June 2021 updates | 2022-03-02 |
| 解決 | 401 authentication error when opening Room Finder Outlook Known issues in May 2021 updates | 2022-02-03 |
| 解決 | Outlook cannot add guest groups in Microsoft 365 Outlook Known Issues in October 2021 updates | 2022-01-19 |
| 解決 | Search results for Find Related Messages in Conversation are incomplete or missing Outlook Known Issues in November 2021 updates | 2021-12-14 |
| 回避策あり | Outlook search does not return results after upgrade to Windows 11 Outlook Known Issues in October 2021 updates | 2021-10-28 |
| 解決 | Outlook Today view is blank on Azure Active Directory joined machines Outlook Known Issues in October 2021 updates | 2021-10-28 |
| 回避策あり | Hosted applications in Outlook error: We can't open the Teams App right now. Please try again later Outlook Known Issues in October 2021 updates | 2021-10-15 |
| 解決 | Search results for Outlook Suggested Searches are not accurate, incomplete, or missing Outlook Known Issues in September 2021 updates | 2021-10-06 |
| 調査中 | Follow up flag status is incorrectly displayed in sent messages Outlook Known issues in March 2021 updates | 2021-09-20 |
| 回避策あり | Characters are displayed as SBC (Single Byte Character Set) after using the "@" symbol when IME (Input Method Editor) is turned on Outlook Known Issues in September 2021 updates | 2021-09-16 |
| 回避策あり | This browser does not support security keys - Error when adding a Gmail account to Outlook Outlook Known Issues in September 2021 updates | 2021-09-03 |
| 解決 | Outlook DLP policy tips not working for certain conditions in email body and attachments Outlook Known issues in July 2020 updates | 2021-08-09 |
| 解決 | Outlook Crash when using Search or Search Suggestions Outlook Known Issues in July 2021 updates | 2021-07-12 |
| 解決 | Calendar meetings showing legacyExchangeDN instead of DisplayName Outlook Known issues in May 2021 updates | 2021-07-02 |
| 解決 | "The properties of the message have been changed" prompt when forwarding/replying in Outlook Outlook Known issues in May 2021 updates | 2021-06-18 |
| 解決 | AutoComplete list scrolls off the screen in Outlook Outlook Known issues in May 2021 updates | 2021-05-14 |
| 解決 | Outlook and other apps won't remember password after Windows Updates Outlook Known issues in October 2020 updates | 2021-02-08 |
| 解決 | Outlook crashes after renaming an email signature Outlook Known issues in December 2020 updates | 2021-01-15 |
| 解決 | Embedded images in Rich Text formatted emails or fields are being blanked out or misaligned Outlook Known issues in November 2020 updates | 2021-01-13 |
| 調査中 | Emails deleted from Outlook.com are reverting back to the Inbox Outlook Known issues in November 2020 updates | 2020-11-18 |
| 調査中 | Outlook errors marking task complete and sending task status report Outlook Known issues in October 2020 updates | 2020-11-06 |
| 解決 | End by field is not displayed correctly in the Appointment Recurrence dialog box Outlook Known issues in September 2020 updates | 2020-10-13 |
| 解決 | Outlook crashes deleting three or more emails from a POP account with Download Headers Only Outlook Known issues in July 2020 updates | 2020-10-01 |
| 解決 | Shared Calendars cannot be closed and gets cleared upon application restart Outlook Known issues in September 2020 updates | 2020-09-25 |
| 解決 | From address not shown on meeting request when the request is sent from a secondary account Outlook Known issues in August 2020 updates | 2020-09-01 |
| 解決 | "Allow Forwarding" option is missing from "Response Options" for a shared calendar Outlook Known issues in April 2020 updates | 2020-09-01 |
| 解決 | Unable to add a Gmail account to Outlook "Could not sign you in to Google" Outlook known issues in the January 2020 updates | 2020-09-01 |
| 解決 | Outlook crashes in OLMAPI32!CopyProps function when using applications that process emails Outlook Known issues in July 2020 updates | 2020-08-11 |
| 解決 | Office Applications crash due to Nahimic audio driver Outlook Known issues in July 2020 updates | 2020-07-13 |
| 解決 | Translate option is missing from Outlook Outlook Known issues in June 2020 updates | 2020-06-30 |
| 解決 | Something is wrong with one of your data files and Outlook needs to close Outlook Known issues in June 2020 updates | 2020-06-25 |
| 解決 | Outlook stops opening .msg and .oft template files Outlook Known issues in April 2020 updates | 2020-05-11 |
| 解決 | Unable to add a Gmail account to Outlook - Allow button grayed out Outlook known issues in the January 2020 updates | 2020-04-03 |
| 解決 | "Access Denied" when launching an Office add-in Outlook known issues in the March 2020 updates | 2020-04-02 |
| 回避策あり | Cannot select From account in email with Outlook Desktop Outlook known issues in the March 2020 updates | 2020-03-16 |
| 解決 | Unable to send emails from QuickBooks, Office applications, or all Windows applications that allow to send files as attach Outlook known issues in the January 2020 updates | 2020-03-02 |
| 回避策あり | Unable to save changes to a draft email in Draft folder for IMAP accounts Outlook known issues in the January 2020 updates | 2020-02-24 |
| 回避策あり | Japanese characters in Group emails are garbled or missing when formatted as Plain Text Outlook known issues in the January 2020 updates | 2020-02-19 |
| 解決 | Outlook users who are booking delegates that add a Room to a meeting invite may notice duplicate emails requesting responses Outlook known issues in the January 2020 updates | 2020-02-13 |
| 解決 | Outlook prompts for credentials for on premise users with Office 365 client Outlook known issues in the January 2020 updates | 2020-01-21 |
| 回避策あり | Outlook stops responding when you attach an email .MSG file Outlook Known issues in March 2024 updates | — |
| 解決 | Outlook fails to start and may prompt to open in Safe Mode on July 15, 2020 Outlook Known issues in July 2020 updates | — |
| 解決 | Holiday is missing and has inaccurate date in Outlook for United Kingdom Outlook Known issues in March 2022 updates | — |
| 回避策あり | Outlook search folders show unexpected mail items with an empty subject Outlook Known issues in April 2020 updates | — |
| 解決 | Recall Message in Outlook Desktop stops working after February 2024 security updates Outlook Known issues in May 2024 updates | — |
| 解決 | Voicemail audio attachments might not be visible in classic Outlook Outlook Known issues in October 2026 updates | — |
| 解決 | Windows cannot find "c:\program files\microsoft office\root\office16\outlook.exe Outlook Known issues in June 2020 updates | — |