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Cannot remove mailbox database

[This topic is prerelease documentation and is subject to change in future releases. Blank topics are included as placeholders. If you have feedback, we'd love to hear it! Email us at ExchangeHelpFeedback@microsoft.com.]  

Applies to: Exchange Server 2016

Microsoft Exchange Server 2016 Setup can’t continue because it can’t remove a user mailbox database from the local server without incurring potential data loss.

Exchange 2016 Setup determines whether all mailbox databases have been removed from the server before the Mailbox server role is removed. However, user mailboxes might still remain on the server.

To resolve this issue, move any mailboxes on the server to another Exchange server or, if the mailboxes and the data contained within them are no longer required, disable the mailboxes. Then run Exchange 2016 Setup again.

Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.

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