This thread began with a strong root-cause report: OneDrive reconnects were failing across ZimaOS because Microsoft Entra returned AADSTS7000222, indicating that the shared application client secret had expired. The Files interface hid the backend error, so the OAuth popup could simply close without a useful message.
The important 2026 update is that this is no longer only an unresolved outage report. Zima staff later announced that ZimaOS 1.6.2 beta fixed the OneDrive key-expiration issue, and users in the same thread confirmed that personal OneDrive access worked again.
What AADSTS7000222 Means
Microsoft's Microsoft client secret guidance defines this error as an expired application client secret. The fix is performed by the application owner: create a new secret and update the application's authentication configuration. That is why re-entering a user's password, changing DNS, or disabling MFA could not repair this particular outage.
How the Community Identified the Root Cause
The useful diagnostic was the backend service log rather than the browser UI:
journalctl --since "5 minutes ago" -u icewhale-files | grep AADSTS7000222If the Microsoft error appeared there, the failure was upstream of the user's local OneDrive credentials.
The Fix Landed in ZimaOS 1.6.2 Beta
The official ZimaOS release notes lists a fix for OneDrive key expiration and an optimized key-update mechanism. In the source thread, Zima staff announced the beta on July 2, 2026; a later user reported successful OneDrive access after applying the patch.
The current ZimaOS cloud integration is therefore the right starting point for normal cloud-drive use, while the ZimaOS backup workflow explains the broader ZimaOS backup path once a cloud destination is connected successfully.
Personal OneDrive and OneDrive for Business Are Not the Same Test
One user reported that the token pass-through worked again but OneDrive for Business did not meet their needs. Do not convert the personal-OneDrive recovery into a claim that every Microsoft 365 business tenant workflow is supported identically.
Bottom Line
The original diagnosis was correct for the 2026 outage: the shared Microsoft Entra client secret had expired. ZimaOS 1.6.2 beta subsequently fixed that specific key-expiration problem. On a current system, update first before attempting manual rclone or Azure-app workarounds, then troubleshoot any remaining personal-versus-business OneDrive behavior separately.
