Is it possible to migrate users without domain trust?

Question

Windows Server

There are two domains: old and new. It turned out that the netbios domain names are identical: firma.local and firma.d1, respectively.
Renaming an old domain fails due to the curvature of the system on its DC and DNS, and without renaming it is not possible to establish trust between domains. You can't rename a new domain.
The ultimate goal is to migrate users from the old domain to the new one and "kill" the old one.
How can this be done without renaming the old or new domains?
Both Windows Server 2008 R2 systems

Answer 1

Hm. it’s even more trite as a regular migrator, you can export the profile and import this profile after entering the machine into a new domain