Recovering from a broken Entra Connect Sync

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Recovering from a broken Entra Connect Sync

Runbook for when Entra Connect sync stops: scheduler, connectivity, and export errors, the deletion threshold protecting you, and rebuilding on a new server.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-connect-sync-broken-recovery-runbook

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Why has Entra Connect stopped syncing?

The scheduler is suspended (often after a failed upgrade), the service account password expired or was rotated, TLS or proxy changes broke connectivity to Entra, the server's certificate or the Entra connector credentia…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-connect-sync-broken-recovery-runbook

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What is the Entra Connect deletion threshold?

A safety limit (default 500 objects) that stops an export when more than that many deletions are staged in one run — typically the result of an OU moved out of sync scope. It protects you from mass-deleting cloud users;…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-connect-sync-broken-recovery-runbook

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Can I rebuild Entra Connect on a new server?

Yes. Install Entra Connect on the new server in staging mode with the same configuration (export the old settings, or use the configuration documenter), verify the staged changes, then switch the old server to staging a…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/entra-connect-sync-broken-recovery-runbook

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