4 sites, 4 AD and one single Exchange Server

Beau Louis 21 Reputation points


one of my customers wants to migrate from an POP/IMAP hosted mail to a local Exchange server.

He currently has 4 sites with 4 servers used as SQL/File servers with 4 different local ADs. Users from all sites have similar mail adresses @mycompany.com

Is it possible to deploy a single Exchange server for the 4 sites located at one of the sites?

Thanks for help.

Take care


Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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  1. KyleXu-MSFT 26,206 Reputation points

    @Beau Louis

    Is it possible to deploy a single Exchange server for the 4 sites located at one of the sites?

    You could let AD accounts located on domain B , C, D, but Exchange mailboxes hosted on domain A. This type of mailbox is called Linked Mailbox. But we don't know whether there exist issue with your SQL/File servers, if your File server needed to use Exchange function(About this one, I would suggest you have a test before migration).

    By the way, there doesn't exist an official tool to migrate mailboxes from IMAP mail server to Exchange on-premises so far(Only supported to migrate to Exchange online). So, you may need to migrate mailboxes data with Outlook(Export and Import PST), or other ways.

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  1. Beau Louis 21 Reputation points

    Hi many thanks...

    This does require further testing. Not sure the customer will accept to pay for that.



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