Classic Outlook with Google Sync has suddenly stopped working (as of June 2)

Anonymous
2025-06-03T11:17:51+00:00

As of yesterday, GSMO which I've been using (mostly) without issue for 8 years has stopped working. Outlook continually freezes and installing/uninstalling both apps is not working. I have a very mature work process within Outlook and using Gmail alone will not be able to match it. I have done some trash/old message clean up in Gmail to no avail. Anyone have any suggestions? Desperate here!

Outlook | Windows | Classic Outlook for Windows | For business

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Anonymous
2025-06-03T21:16:18+00:00

Had the exact same issue. Started today too (June 3rd 2025). Just before it started, when I opened outlook it wanted to do a authentication verification. It opened a chrome tab and I confirmed the login and rights. Right after that - within 5 seconds of opening outlook, outlook windows all close (silent crash) with no errors shown. I have a secondary outlook profile to an M365 mailbox that does not use google workplace sync and that profile still works normally.

I set my laptop to airplane mode, opened my normal outlook profile with GSMO. With airplane mode on, I could access the Google Workspace Sync icon on the taskbar, Turn Sync Modules on/off - deselect Google Contacts.

Turned airplane mode off again, Close and reopen outlook and email sync is fixed.

Looks pretty definite that google has a bug to fix here. Just gotta remember to recheck "Google Contacts" after their next update.

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  1. Anonymous
    2025-06-09T14:27:30+00:00

    Suddenly I have the same problem of synchronisation, emails to phone but not transferred to desktop - or else taking hours and hours. Site told me to try SARA and I got this message: 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable. That's not either helpful or impressive.

    What is Microsoft doing to me?

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  2. Anonymous
    2025-06-09T13:07:47+00:00

    Having the same problem, only with contacts. Every outlook contact is modified on every sync.

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  3. Anonymous
    2025-06-08T13:16:15+00:00

    New Outlook stopped syncing Gmail and sending emails for me at about the same time that your issues arose. I've only ever used IMAP, although I would not be surprised if New Outlook used another method behind the scenes as it appears to retrieve email on its server side. Back to Classic Outlook.

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  4. Anonymous
    2025-06-07T22:40:19+00:00

    Thanks Chris, simple temp solution.

    I combined two email accounts, so going to web based was not really an option. So went to "New Outlook", rapidly remember why I did not change to it when it came out.

    So I will wait for Google to send a fix.

    Tony

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