An Entra Connect synchronization problem appears to have disabled or removed all of our Microsoft 365 users, including every Global Administrator, leaving us completely locked out of the tenant. We cannot open a normal support case through the admin center, and the published support line only routes us through an automated system before disconnecting. We need to reach Microsoft's tenant recovery or data protection team. Are there reliable escalation options, alternate support routes, or workarounds for getting a human involved?
4 Answers
Keep trying the published Microsoft support route and clearly explain that this is a tenant lockout requiring the data protection or tenant recovery team. If you have a Microsoft Partner with an active GDAP relationship, ask them to open a case against the affected tenant. Another possible workaround is creating a temporary trial tenant and raising a support request from there, referencing the production tenant you can no longer access.
Thanks—those are useful suggestions. We have finally reached hold music instead of being disconnected by the automated system.
Once access is restored, keep privileged identities separate from synchronization. Use cloud-only emergency access accounts, ideally two independently protected break-glass accounts, and do not make synchronized domain administrator accounts Global Administrators. Give normal administrators separate cloud identities and use just-in-time elevation such as PIM where appropriate. This prevents an on-premises sync failure or directory compromise from removing every recovery path.
I would go further and never synchronize administrative accounts into Entra at all. Keep domain administrator accounts on-premises and use separate cloud-only identities for Entra administration.
A reseller or large Microsoft services partner may be able to escalate this more effectively than an individual caller, especially if they already manage part of the tenant. Contact any existing VAR or partner and ask whether they retain delegated access. Be prepared for the tenant recovery process to take time, since Microsoft will need to verify ownership before restoring administrative access.
Check the recent Entra Connect and Active Directory changes carefully. A renamed or moved organizational unit, a changed sync scope, or a duplicate or cloned synchronization rule can cause objects to disappear from the sync scope and become disabled in Entra. If you can identify the change, restoring the original OU structure or correcting the synchronization rule may allow the accounts to sync back, although Microsoft should guide any recovery actions while access is lost.
In our case, someone disabled a local account and then a duplicate or cloned sync rule was discovered. Removing that old rule caused the larger sync problem to appear, so review the connector configuration and recent changes very cautiously.

The partner route is probably the fastest option if an existing GDAP relationship is still active.