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Hi. I have on premise exchange server 2016. We have one user with archive . Unfortunately it got disappeared . I could see (0 MB in EAC) .I believe it is because Archive GUid so changed to Exchange online archive guid . The archive guid was different before. How can change it old archive guid in active directory users and computers ? The mailbox database whitespace has not changed meaning the archive is still there right.? I can't archive in user's outlook
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Hello @Jonathan Priyaraj,
Welcome to the Microsoft forum for technical support.
According to your description, you can change the archive GUID according to the following steps:
A blank unchanged mailbox database indicates that the data still exists but is disconnected. It is recommended that you verify the status of the database and archive mailboxes using Exchange Management Shell commands, such as "Get-MailboxDatabase" and "Get-MailboxStatistics" for user archive mailboxes, to confirm that the mailbox data is intact.
Please feel free to contact me if you have any queries.
Best,
Jake Zhang
Hi Jake, the modification was done through AD users and computers. How can I retrieve the old Guid in this case ?
Hi @Jonathan Priyaraj,
Thanks for your response.
If you want to find the old value of 'msExchArchiveGUID' before it was changed in Active Directory, you can try the following method:
If you regularly back up your Active Directory, you can restore the old value of 'msExchArchiveGUID' from the backup. This may require your IT department to restore the entire domain controller from the backup or use an authorized backup recovery tool to retrieve the old values for a particular attribute.
If there are no backups available, it may not be possible to retrieve old values.
Please feel free to contact me if you have any queries.
Best,
Jake Zhang
Hi @Jonathan Priyaraj,
Just wanted to check if the answer shared below helped. If it helped, then would request you to please "Accept the answer" as it would be helpful to others in the community as well. Thank you for helping to improve Microsoft Q&A!
Best,
Jake Zhang