Did you confirm FRS and domain health were 100% before beginning migration? If not I'd suggest rolling back to check. Then if further help was needed, please run;
- Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
- repadmin /showrepl >C:\repl.txt
- ipconfig /all > C:\dc1.txt
- ipconfig /all > C:\dc2.txt
then put unzipped text files up on OneDrive and share a link.