Lost my on premise AD that was synced with Azure AD, how can I restore?

Question

I had a problem with my Active Directory Server, and the backup was too old to restore, since it was syncing to Azure AD Connect, I want to know if it is possible to restore my AD on premise based on the information from AAD? If yes, how to do? My users, group, etc on AAD was controlled by the local domain (namebusiness.local) to Cloud Domain (namebusiness.com).

If not, is it possible to create a new domain synced with office 365 without having problem with my users like (@namebusiness.com) and grupos like (@namebusinness.com)?

Answer 1

HI Andre,

It is bit different scenario as the source is not available and there is no way you can sync back from AAD to onpremise and match the objects in reverse, so the I will suggest you read this article as the soft match and hard match is the possibilty by using UPN or one of the attributes once you create the Onprem AD. https://learn.microsoft.com/en-us/azure/active-directory/hybrid/connect/how-to-connect-install-existing-tenant

Check this specific with UPN matching and this will help you - https://learn.microsoft.com/en-us/troubleshoot/azure/active-directory/use-upn-matching-identity-sync

Hope this helps.

JS

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