In Microsoft 365, I have Error Synchronizing Folder [80040111-501-0-0]. How do I fix it?

DC 0 Reputation points

Would love some help and when you answer, please take into consideration, I'm not very technical.

I'm having intermittent synchronization issues with Synchronizer Version 16.0.17328. When there is a problem I get the same message. The URL link appears to be broken or at least is directed to a general site and not anything helpful.

Here is what I get. I truncated the error message because it repeats probably 20 times:

19:43:34 Synchronizer Version 16.0.17328

19:43:34 Synchronizing Mailbox 'name of emailbox'

19:43:34 Synchronizing Hierarchy

19:43:35 Synchronizing local changes in folder 'Inbox'

19:43:35 Uploading to server ''

19:43:36                  19 item(s) deleted in online folder

19:43:36 Synchronizing server changes in folder 'Contacts'

19:43:36 Downloading from server ''

19:43:36 Synchronizing server changes in folder 'Recipient Cache'

19:43:36 Downloading from server ''

19:43:36    1 view(s)/form(s) updated in offline folder

19:43:36 Synchronizing server changes in folder 'Deleted Items'

19:43:36 Downloading from server ''

19:43:37    14 item(s) deleted in offline folder

19:43:37 Synchronizing server changes in folder 'Junk Email'

19:43:37 Downloading from server ''

19:43:37 Error synchronizing folder

19:43:37   [80004002-501-0-0]

19:43:37    The client operation failed.

19:43:37    Microsoft Exchange Information Store

19:43:37    For more information on this failure, click the URL below:


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  1. ChristyZhang-MSFT 20,621 Reputation points Microsoft Vendor

    Hi @DC ,

    Thanks for your reply!

    It's suggested that you could try to use the Microsoft Support and Recovery Assistant, which works by running tests to figure out what's wrong and offers the best solution for the identified problem.

    If the issue persists, please try the below troubleshooting:

    • Check if you enable Cache Mode. If so, it's suggested that you could disable it to check if there're any differences.
    • Considering that it may be caused by the damage of the profile/data file in the Outlook client, it is suggested that you could try to create a new profile(Control Panel>Mail>Show Profiles>add) and add the account for testing to check if there are some differences.
    • Considering corruption in send/receive settings file may cause this issue, You can try to reset the SRS file to check if there're any differences.(Go to C:\Users%username%\AppData\Roaming\Microsoft\Outlook>Rename the Outlook.srs file to Outlook.srs.old>restart Outlook)

    Hope to help you!

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