Classic Outlook crashes on reply and forward

• Copilot buttons are missing in classic Outlook for WindowsInvestigating · Classic Outlook known issues
• Public Holiday Calendars Missing Dates After June 2026 in OutlookWorkaround · Classic Outlook known issues
• Classic Outlook for Windows might crash when accepting a Shared Calendar inviteInvestigating · Classic Outlook known issues
• In AutoComplete, the "X" to remove individual suggested recipients might not work as expectedInvestigating · Classic Outlook known issues
• Outlook crashes unexpectedly when using Kaspersky antivirusInvestigating · Classic Outlook known issues
• Users may get the error "Can't connect to the server" when creating groups in classic OutlookInvestigating · Classic Outlook known issues

No field changes in the recorded history.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

A day selects the latest observation by the end of that UTC day; today's selection can change until midnight. History starts when this installation records it.

• Watch above puts it on My radar, which shows when the publisher changes it.
• Outlook RSS feed: new known issues, releases and retirements.
• All open known issues across Windows, Office, Graph and Windows 365.