Using classic Outlook for Windows in business environments
Microsoft is currently reporting service degradation affecting Microsoft 365, but there is no confirmed public restoration time yet; Outlook should recover automatically as Microsoft restores the service.^1^
Check the latest update
- Microsoft 365 administrator: Sign in to the Microsoft 365 admin center, then select Health → Service health → Active issues Microsoft is working on. Open the relevant Exchange Online or Outlook incident to see its status, user impact, progress messages, and any restoration estimate Microsoft publishes.^2^
- Non-administrator: Ask your IT administrator for the latest Exchange Online incident update, or monitor Microsoft’s public Service Health Status page.
Because this is an active service degradation, avoid changing Outlook profiles, reinstalling Office, or altering account settings for now. If Microsoft marks the incident Service restored and Outlook still does not work, then report the remaining issue to your IT administrator for tenant- or device-specific troubleshooting.
References