I have a mixed version Windows network running of 3 WS2003 AD servers, which seems to be happily coexisting with WS2008, 2012 app and fileservers and mixed client network XP to Windows10.
I have been able to validate with help in previous questions on EE a plan to upgrade the main network, but the Accounts Department cannot be upgraded at the same time and I am not sure if I remove the AD partition from the WS2003 fileserver in Accounts and just leave it as a WS2003 fileserver, if that should continue to function in the upgraded WS2016 AD environment ? There will be also some filesharing from client computers to another WS2016 fileserver which I believe from posts on EE should not be a problem.
If the above is probably not going to work (AD is otherwise stable) then the question becomes whether and how to split the AD under the same forest, leaving the legacy AD roles from WS2013 to run off the original WS2003 AD partition for Accounts (with or without VLAN?) and migrate other objects to a new (tree ? domain?)
Any input/thoughts on breaking down the problem greatly appreciated...