OneDrive won't sign in for a rejoining hybrid-AD user with two active personal sites

Selvapriyan Ramachandran 20 Reputation points
2026-08-20T02:59:16.4233333+00:00

We have a returning employee in a hybrid Azure AD (Entra) join environment. When staff leave, we disable the on-prem AD account, which disables the associated services. Because this user has left and rejoined, his profile has been created multiple times, and the on-prem AD account has been disabled and re-enabled/recreated across those cycles.

The problem: The user cannot sign in to OneDrive on any computer. When he launches OneDrive it just does nothing — no error, it simply never finishes signing in. This happens on every machine, not just his own, so it doesn't look like a local cache issue.

What I've found so far:

When I check SharePoint Online admin, there are two active personal (OneDrive) sites for the same user:

  • .../personal/<user> — Active, Unlock, ~1,770 MB (the real data)
  • .../personal/<user>2 — Active, Unlock, ~7 MB (appears to be an empty duplicate from a recreate)

Get-SPOUserOneDriveLocation returns the first URL (the real 1,770 MB site), and browsing to either URL redirects to that same site.

Using a network trace (Fiddler), OneDrive completes discovery successfully — it resolves federationProvider and idp for the user (HTTP 200) — but it never makes a request to -my.sharepoint.com afterwards. It just loops on discovery/telemetry and never opens a sync session (no SPFileSync / no Subscription created), so authentication to the actual OneDrive site never happens.

Ticket is still open with MS

Microsoft 365 and Office | OneDrive | For business | Windows
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  1. Jay1 Tran 100 Reputation points Independent Advisor
    2026-08-20T03:25:07.22+00:00

    Hi Selvapriyan,

    Thank you for reaching out.

    Based on your description, the issue appears to be related to the identity association between the returning employee’s current account and the original OneDrive.

    Even though the account was deleted from on-premises Active Directory rather than manually from the Microsoft 365 admin center, that deletion can be synchronized to Microsoft Entra ID. If the account is later recreated with the same username, it may be treated as a new identity. SharePoint Online can then retain the original identity association and create an additional OneDrive with a numeric suffix.

    To resolve issue, please follow these steps:

    1. Sign in using an account with the SharePoint Administrator role.
    2. Open the Microsoft Site User ID Mismatch diagnostic: https://aka.ms/PillarSiteUserIDMismatch
    3. Enter the returning employee’s current UPN.
    4. Enter the original, unsuffixed OneDrive URL that contains approximately 1,770 MB of data.

    User's image

    1. Click Run Tests to perform the diagnostic and follow the offered remediation if an identity mismatch is detected.

    As the support ticket remains open with Microsoft, please continue working with Microsoft Support and share the diagnostic results with the assigned engineer so they can validate the service-side OneDrive and SharePoint identity mappings.

    For more information, please refer to: Fix site user ID mismatch in SharePoint or OneDrive - SharePoint | Microsoft Learn

    I hope this information is helpful. Please follow these steps and let me know if it works for you. If you have any updates regarding the issue, please feel free to share them with me.       

    Thank you for your patience and your understanding. I look forward to continuing the conversation. 

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