Domain trust or joining the domain to the parent domain name?
We have taken over a big company with a lot of big and small sites all arround the world. We had already setup a trust between the domains but now we want one single domain name,so everybody is logging into the same domain for the ease of use for sharing everything.
The quistion is where do i start, are there any roadmaps with steps to follow?
We are from the old timeline so we run everything on-premise.
Lets assume we are on the level of 2012R2 domain and forest. ( we do have a couple of 2008r2 but will be fasing out soon)
If 2016 is a better and more easy to follow plan then we are able to do first an upgrade to Domain and forest 2016.
I always worked in a single domain so all information is welcome at this time.