Fixes or workarounds for recent issues in Outlook for Mac

Last updated: May 2023

Outlook for Mac features, add-ins, and known issues

• [WORKAROUND] IMAP Yahoo and AOL accounts might experience issues with re-syncing folder content

• [FIXED] Selecting Reply, Reply All, and Forward buttons is not working as expected

• [FIXED] Outlook fails to send attachments and inline images when sending a signed or encrypted email using the new Outlook for Mac

• [FIXED] New Outlook for Mac stops responding when using the search feature

• [FIXED] Attachments missing from emails when using macOS Big Sur

• [FIXED] Can't add M365 accounts in Outlook for Mac when the macOS language is set to Turkish

• [FIXED] Can't create new signatures in new Outlook for Mac and existing signatures are missing

• [FIXED] Calendars don't display in the left pane after upgrading to 16.63 build in Legacy Outlook for Mac

• [FIXED] Outlook stops responding when viewing Uber receipt emails and some other emails with tables

• [FIXED] Outlook for Mac fails to open attached files if the helper application is already running after installing macOS 11.6.6 update

• [WORKAROUND] Outlook for Mac “Account already exists” error

• [FIXED] To, CC, and BCC fileds are shortened after updating Outlook for Mac

• [FIXED] Search in Outlook for Mac returns no results after installing macOS Monterey 12.1

• [FIXED] The new Outlook for Mac users cannot access Online Archive mailbox

• [FIXED] Outlook for Mac crashes unexpectedly on startup or during mail synchronization

• [FIXED] Characters are garbled in email body

• [FIXED] Error -17099 or -3253 when trying to send an email with an attachment

• [WORKAROUND] Message body of an .eml attachment is blank in Preview

Changed functionality and blocked or discontinued features

• Missing toggle button in Outlook for Mac

• Outlook for Mac 2011 does not work with macOS 10.15 Catalina

• Sending meeting updates with REST calendar sharing feature in Outlook for Mac

• Categories no longer appear in the sidebar of individual calendars

• Known issues syncing Google accounts to the Microsoft Cloud

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