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
    2025-06-03T17:34:56+00:00

    Also, I went in and removed another large folder from IMAP and started the synch again... right now it hasn't frozen yet. I had also removed all other types of synch like Contacts, Calendar etc. When I tried to add Contacts in, it froze up again. It will open for just long enough to add/remove module options, so I may add/remove all of them to see which ones break the synch. I can live without most things, just not mail.

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  2. Anonymous
    2025-06-03T17:56:30+00:00

    I have had this same issue. It seems to be an issue with the contact sync. Now I can't even sync contacts and get an error, but the remainder of the sync seems to be working. It is linked somehow to the latest Workspace sync update with google

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  3. Anonymous
    2025-06-03T18:05:43+00:00

    I agree - contacts seems to be an issue. I may try synching with Calendar, did you try that?

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  4. Anonymous
    2025-06-04T04:25:30+00:00

    Have chatted with google support - its seems they have recognised the issue with the contacts sync and are working on a fix to push out and update version 4.3.73.00 of google workspace sync for Outlook. Meantime i have unsync'd my contacts to get Outlook functioning again.

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