Hi @Ole Erik Skare , changing the value in ADSIEdit only will not update the real status of the mailbox archive status.
Please make sure you have followed all steps right list in this official document: Create a cloud-based archive for an on-premises primary mailbox in an Exchange hybrid deployment
Or you could use the command below to create a remote archive for the existing on-premises user
Enable-Mailbox "" -RemoteArchive -ArchiveDomain "domain.mail.contoso.com"
Detailed information and usage about the cmd Enable-Mailbox
After you finish the steps above successfully, (Optional) run directory synchronization
Start-ADSyncSyncCycle -PolicyType Delta
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