Installing Exchange on a domain controller is not recommended [WarningInstallExchangeRolesOnDomainController]

Microsoft Exchange Server 2016 Setup has detected that the computer you're attempting to install Exchange 2016 on is an Active Directory domain controller. Installing Exchange 2016 on a domain controller isn't recommended.

If you install Exchange 2016 on a domain controller, be aware of the following issues:

  • Configuring Exchange 2016 for Active Directory split permissions isn't supported.

  • The Exchange Trusted Subsystem universal security group (USG) is added to the Domain Admins group when Exchange is installed on a domain controller. When this occurs, all Exchange servers in the domain are granted domain administrator rights in that domain.

  • Exchange Server and Active Directory are both resource-intensive applications. There are performance implications to be considered when both are running on the same computer.

  • You must make sure that the domain controller Exchange 2016 is installed on is a global catalog server.

  • Exchange services may not start correctly when the domain controller is also a global catalog server.

  • System shutdown will take considerably longer if Exchange services aren't stopped before shutting down or restarting the server.

  • Demoting a domain controller to a member server isn't supported.

  • Running Exchange 2016 on a clustered node that is also an Active Directory domain controller isn't supported.

We recommend that you install Exchange 2016 on a member server.

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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