When Outlook opens your Google Workspace profile, Google Workspace Sync for Microsoft Outlook (GWSMO) begins synchronizing data to your Google Workspace account from your existing Outlook profile.
Before a synchronization, GWSMO scans add-ins installed on Outlook and compares them to a list of add-ins known to cause sync issues. In severe cases, these add-ins can corrupt your local PST file.
Consult your Microsoft documentation on how to turn off add-ins in Outlook.
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