Error 1208400 when syncing personal vault with OneDrive (Microsoft 365)

Hi everyone,

I'm experiencing a persistent error 1208400 when trying to sync my personal vault with OneDrive using my Microsoft 365 account. I have tried all the usual troubleshooting steps but the issue remains.

Environment:

- Enpass Windows: 6.12.2 (2558) on Windows 11

- Enpass iPad: 6.11.22 (1229) on iPadOS

- Cloud: Microsoft 365 personal account (OneDrive)

What I already tried:

1. Removed Enpass app permissions from Microsoft account at account.microsoft.com/privacy/app-access

2. Deleted the local OneDrive sync folder at C:\Users\[user]\OneDrive\Anwendungen\Enpass

3. Reconnected sync in Enpass → folder gets recreated but remains empty → error 1208400 appears immediately

4. Checked the app cache folder at %LocalAppData%\Packages\SinewSoftwareSystems.EnpassPasswordManager_fwdy0m65qb6h2\LocalCache — no OneDrive tokens found

5. Same error occurs on iPad with the same Microsoft 365 account

Important note:

I have a second vault (family vault) which syncs perfectly fine using a separate dedicated Microsoft 365 account on the same devices. The error only occurs with my personal Microsoft 365 account.

This suggests the issue might be related to a corrupted or stale token/session specifically tied to my personal Microsoft 365 account in Enpass — possibly from a previous failed sync attempt with a different vault.

Has anyone encountered this issue and found a solution? Is there a way to completely clear all stored OneDrive credentials/tokens for a specific account in Enpass without reinstalling?

Thanks in advance!