Identified the underlying cause for this class of OneDrive failure.
The mount disappearance is the visible symptom; the actual error is
AADSTS7000222 from Microsoft Entra (IceWhale’s Azure app client_secret
expired). Backend logs and full diagnosis here: https://community.zimaspace.com/t/root-cause-onedrive-integration-broken-globally-icewhales-azure-client-secret-has-expired-aadsts7000222/8569
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