Fix Exchange Archive GUID Errors in Microsoft 365 Hybrid
Question details
The user needs to resolve an archive validation error in a Microsoft 365 hybrid deployment caused by a mismatch between the on-premises msExchArchiveGUID and the Exchange Online archive GUID.
- Product
- Microsoft 365 Exchange
- Device & OS
- not provided
- Scenario
- Managing mailbox archives and synchronizing user attributes in a Microsoft 365 hybrid environment.
- Observed behavior
- Administrators experience Microsoft 365 hybrid archive errors because the on-premises Active Directory msExchArchiveGUID attribute does not match the cloud-based Exchange Online archive GUID.
Ensure you have administrator access to the on-premises Exchange Server or Active Directory, as well as the necessary permissions to run Exchange Management Shell or Active Directory PowerShell commands.
Update ArchiveGuid using the Exchange Management Shell
Use this method if you still maintain an on-premises Exchange server to manage hybrid mailbox attributes.
In a standard hybrid configuration, the on-premises msExchArchiveGUID must perfectly match the Exchange Online archive GUID. You can correct mismatches by updating the RemoteUserMailbox properties.
Open the Exchange Management Shell and run 'Get-Recipient -Identity user@contoso.com | Format-List ArchiveGuid, RecipientTypeDetails' to check the current status.
If the RecipientTypeDetails is RemoteUserMailbox and the ArchiveGuid is 0, run 'Enable-RemoteMailbox -Identity user@contoso.com -Archive'.
Run 'Set-RemoteMailbox -Identity user@contoso.com -ArchiveGuid <Cloud Archive GUID>' (replacing the placeholder with the actual Exchange Online GUID).
Wait for your Azure AD Connect sync cycle to complete before verifying the resolution in the Microsoft 365 admin center.
Update msExchArchiveGUID directly via Active Directory PowerShell
Use this approach if your on-premises Exchange server has been decommissioned but Exchange attributes remain managed via Active Directory.
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Frequently Asked Questions
How do I find the Exchange Online archive GUID?
You can find the cloud archive GUID by connecting to Exchange Online PowerShell and running 'Get-Mailbox -Identity <User> | Select-Object ArchiveGuid'.
Why does this Archive GUID mismatch happen in hybrid environments?
This mismatch typically occurs when an in-place archive is enabled directly in Exchange Online rather than from the on-premises Exchange server, causing the cloud environment to generate a unique GUID that doesn't sync back to the local Active Directory.
How long does it take for directory synchronization to fix the archive error?
Azure AD Connect typically syncs changes every 30 minutes. If you want to push the changes immediately, run 'Start-ADSyncSyncCycle -PolicyType Delta' on your AD Connect server.
