Gmail for Android and iOS lets you sign into non-Google accounts to read and send emails. Microsoft Outlook and Hotmail integration in Gmail is currently broken.

Since this morning PT (5:10 p.m. UTC), “IMAP syncs with Microsoft servers are experiencing failures causing sync issues with Gmail application.”

The end result is that “customers accessing Outlook or Hotmail email accounts on Gmail application across all device platforms are unable to sync new messages.” They are encountering a warning triangle with the following message:

There was a problem syncing this folder, please try again later.

Google “continues to investigate the root cause of the issue.” There are no issues with Gmail accounts, or other instances of using the app as a regular email client for other services. Impacted users can presumably just use the Outlook app.

Update 8:27 p.m. UTC:

The investigation so far from our engineering has not uncovered any issues with Gmail application authentication and we are continuing to investigate further for the root cause.

Update 9:03 p.m. UTC:

Our engineering team is currently working in partnership with the Microsoft team to investigate the email sync issue via IMAP.

Update 11:54 p.m. UTC:

Update: Microsoft team has acknowledged that other large mail providers beyond Gmail are also not able to sync with Microsoft’s IMAP server. They are working on the issue.

Udate Feb 23, 2:57 a.m. UTC:

The Gmail sync issue with Microsoft servers when using IMAP is now resolved. Thank you for your patience while we resolved the problem.

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About the Author

Abner Li

Editor-in-chief. Interested in the minutiae of Google and Alphabet. Tips/talk: