Domain Functional Level Exchange 2016

If you are running exchange 2016 anywhere in your environment and if any of the domain controllers used by exchange are running windows server 2016 then the forest functional level must be raised to 2008r2 or later.

Domain functional level exchange 2016. In our experience customers who keep their domain controllers deployed at the latest os revision level also employ the highest level of reliability security and. You need to change the forest functional level instead of the domain functional level. There is a nuance with the latter. Please run the following command to check your current domain level run your powershell as administrator.

Operating system environment exchange 2019 exchange 2016 cu12 and later exchange 2016 cu7 and later exchange 2016 cu3 to cu6 exchange 2016 cu2 and earlier exchange 2013 sp1 and later exchange 2010 sp3 ru22 or later exchange 2010 sp3 ru5 ru21. Mit dem ende der lebensdauer von windows server 2003 2008 und 2008 r2 müssen diese domänencontrollern dcs auf windows server 2012 2012 r2 2016 bzw. In the left navigation pane right click the domain for which you want to raise the functional level and then click raise domain functional level. Weitere informationen zu features die auf niedrigeren funktionsebenen verfügbar sind finden sie unter understanding active directory domain.

For two cases you may receive error that the function level should be upgraded to windows server 2008 r2 or later. In this lab i had the domain and forest functional level set to server 2016. Windows server 2019 active directory servers. Exchange server 2016 setup.

Exchange 2016 cu3 added support for installing exchange 2016 onto windows server 2016 and also to have windows 2016 domain controllers dcs in the environment. Open active directory domains and trusts domain msc. Dcs can support automatic rolling of the ntlm and other password based secrets on a user account configured to require pki authentication. Read only global catalog servers and read only domain controllers are not supported.

I was able to. Get adforest fl rootdomain forestmode. The second case is when you need to install exchange server 2016 with cumulative update 7 or later. If forest mode is not windows2008r2forest please raise the forest functional level via the following command.

This was fine until a few days later when i needed to test an application that was not supported for functional domains and forest levels greater than server 2012r2. When you raise the domain functional level to windows server 2016 and if the forest functional level is windows server 2012 or lower you have the option of rolling the domain functional level back to windows server 2012 or windows server 2012 r2. Windows server 2016 domain functional level features all default active directory features all features from the windows server 2012r2 domain functional level plus the following features. Sign in to the domain controller holding the pdc emulator fsmo role.

You can set the domain functional level to a value that is higher than the forest functional level but you cannot set the domain functional level to a value that is lower than the forest functional level. Rather than starting from scratch with this lab i decided to test lowering the functional levels from server 2016 to server 2012r2.