Forum Discussion
Exchange SE and Domain / Forest Functional Level 2025 Support
Does anyone have any general idea on when they may test support for Domain / Forest Functional Level 2025? We're still rocking hybrid with Exchange SE and ExO and as such we're waiting on the supportability matrix (https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix#supported-active-directory-environments) to get updated so we can raise the DFL/FFL. Currently Exchange SE supports 2025 AD servers so they've verified the schema update from 88 to 91 is good to go but our Exchange team doesn't want us to raise the functional level until this matrix shows that it's supported for our current Exchange version.
Thanks for any insight.
Supported Active Directory environments
The following table lists the supported Active Directory environments for Exchange Server.
Version | Active Directory servers | Forest Functional Levels |
---|---|---|
Exchange Server SE | Windows Server 2025 Windows Server 2022 Windows Server 2019 Windows Server 2016 Windows Server 2012 R2 | Windows Server 2016 Windows S |