Domain Trust Different Functional Levels

If you have to revert to a lower functional level with a version of windows server that is earlier than windows server 2008 r2 you must rebuild the domain or forest or restore it from a backup copy.

Domain trust different functional levels. The netdom and nltest command line tools can be used to find display create and manage trusts. Will a unidirectional trust work. To create a forest trust the minimum forest functional level requires for the forests that are involved in the trust relationship is windows server 2003 and these should not be a problem for higher. Domain based dfs namespaces running in windows server 2008 mode which includes support for access based enumeration and increased scalability.

Active directory domains and trusts is the microsoft management console mmc that is used to administer domain trusts domain and forest functional levels and user principal name suffixes. Hi all i need to configure trust between 2 ad domains domain a. Identifies the types of domains. Hi you are going to up trusts between two different forests which have different functional levels.

Before deploying a domain trust you should ensure that the type s used are correct for the tasks at hand. There are some explanations with the functions up to windows server 2008 r2 and some on the differences between windows server 2008 r2 and windows server 2012. With windows server 2012 and r2 it is possible to roll back forest and domain functional level with limitation as defined in table in the link. In this scenario you can change the domain mode to native mode by using the active directory users computers snap in by using the active directory domains trusts ui mmc snap in or by programmatically changing the value of the ntmixeddomain attribute to 0 on the domaindns.

I basically want my users in the old domain to be able to login via rdp into the machines in the new domain but not the other way round. Today i recognized that it is not easy to find a comprehensive summary table about active directory domain and forest functional levels operating mode on the internet. Already existing originally it was a sbs 2003 then sbs 2011 domain now dc is windows 2012 r2 standard functional level is 2003 i still have a 2003 server to run an old legacy application. 2008 trusts 2000 mixed mode or am i forced to rise the functional level.

I tested this at home on my personal vsphere server by using a copy of the nt 4 0 vm and creating a trust between my 2003 domain and the nt 4 0 server which was successful although it did take a bit of tinkering to do it. It has a windows 2000 mixed functional level and the other domain is 2008 functional level. Active directory could not update the functional level of the following domain because the domain is in mixed mode.