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Resolve validation errors for an archive mailbox

  • Applies to: Exchange Online

Original KB number:   4053483

Symptoms

For some user mailboxes in a hybrid Exchange environment, you find either of the following validation error messages in the Microsoft Entra admin center or Microsoft 365 admin center:

  • Failed to sync the ArchiveGuid <GUID> of mailboxMailboxGuid because one cloud archiveCloudArchiveGuid exists.

  • Failed to enable the new cloud archiveCloudArchiveGuid of mailboxMailboxGuid because a different archiveArchiveGuid exists. To enable the new archive, first disable the archive on-premises. After the next Dirsync sync cycle, enable the archive on-premises again.

Also, you can't update most property and attribute values of these mailboxes, and synchronization from Microsoft Entra ID to Exchange Online fails.

Cause

For each affected user mailbox, the issue occurs if the ArchiveGuid property value in Microsoft Exchange Server doesn't match the msExchArchiveGUID attribute value in Exchange Online. The ArchiveGuid and msExchArchiveGUID values identify the archive mailbox that's associated with a user mailbox.

This inconsistency occurs if either of the following PowerShell cmdlets are run in the on-premises Exchange Management Shell (EMS) to enable an archive mailbox that was originally enabled from Exchange Online:

  • Enable-RemoteMailbox <user mailbox ID> -Archive
  • Enable-Mailbox <user mailbox ID> -RemoteArchive -ArchiveDomain <domain>.mail.onmicrosoft.com

Important

For cloud mailboxes in an Exchange hybrid environment that are synchronized from on-premises Active Directory, enable archive mailboxes from Exchange Server, not from Exchange Online.

Resolution

Note

We recommend that you don't manage Exchange attributes for synchronized users by using Active Directory PowerShell or ADSI Edit. For more information, see Manage recipients in Exchange Hybrid environments using Management tools and Can third-party management tools be used?

To fix the issue, update the on-premises ArchiveGuid property value to match the Exchange Online msExchArchiveGUID attribute value. Follow these steps:

  1. Run the following PowerShell cmdlet in Exchange Online PowerShell to get the msExchArchiveGUID attribute value from Exchange Online:

    Get-Mailbox -Identity <cloud user mailbox ID> | FL ArchiveGuid

  2. Run the following PowerShell cmdlet in the on-premises EMS to get the RecipientTypeDetails and ArchiveGuid parameter values:

    Get-Recipient -Identity <user mailbox ID> | FL RecipientTypeDetails,ArchiveGuid

  3. Depending on the RecipientTypeDetails and ArchiveGuid parameter values from step 2, select one of the following options:

    • If the RecipientTypeDetails property value is RemoteUserMailbox and the ArchiveGuid property value is all zeros, run the following PowerShell code in the on-premises EMS:

      # Create an archive mailbox object for sync to the cloud.
Enable-RemoteMailbox <user mailbox ID> -Archive
# Set the ArchiveGuid parameter value of the user mailbox to the `msExchArchiveGUID` attribute value.
Set-RemoteMailbox -Identity <user mailbox ID> -ArchiveGuid <msExchArchiveGUID attribute value>

    • If the RecipientTypeDetails property value is RemoteUserMailbox and the ArchiveGuid property value is not all zeros, run the following PowerShell code in the on-premises EMS:

      # Set the ArchiveGuid parameter value of the user mailbox to the msExchArchiveGUID attribute value.
Set-RemoteMailbox -Identity <user mailbox ID> -ArchiveGuid <msExchArchiveGUID attribute value>