The administration of a hybrid deployment that connects on-premises Exchange Server with Exchange Online, enabling seamless integration and centralized control.
Thank you for reaching out.
Based on your description, since the newly provisioned devices activate successfully while previous devices do not, this appears to be related to stale Office activation or WAM identity data remaining on affected devices after the user account was deleted and recreated through Microsoft Entra Connect synchronization.
Although authentication succeeds and the correct licensed account is shown in Word, Office may still be referencing cached identity or activation information associated with the previous account state. This can result in Office remaining in a View Only (Unlicensed) state and repeatedly prompting for activation, while unaffected or newly built devices activate normally.
You could try using Microsoft's official Office activation reset and cleanup tools on a few affected devices to see if this helps:
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OLicenseCleanup.vbsto remove existing Office activation and licensing data. -
signoutofwamaccounts.ps1to clear Office-related WAM account information.
Please ensure that all Office applications are closed, then run the scripts with administrative privileges. After the scripts have completed, restart the device before signing in again to see if the issue still persists.
You can refer via:
Reset activation state for Microsoft 365 Apps for enterprise | Microsoft Learn
Microsoft 365 Apps activation Unlicensed product error | Microsoft Learn
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