is the local DNS a replication of the branchSorry, I'm not sure I understand what you're asking.
Your setup is fine.I am getting that error message, though, and none of the other branch DCs have this issue. Every branch DC shows up in Forward Lookup Zones/mydomain.com/_msdcs/
What is the output from nslookup 10.2.100.121?nslookup looks normal. Same results from any DC.
C:\>nslookup 10.2.100.121 Server: UnKnown Address: ::1 Name: HQDC1.mydomain.com Address: 10.2.100.121
You are using the /e option, it is not clear that the error is reflective of this branch or one if the other locations.It's definitely referring to BranchDC1, and the error appears regardless of where I do the test from.
DC: BRANCHDC1.mydomain.com Domain: mydomain.com TEST: Records registration (RReg) Network Adapter  Microsoft Virtual Machine Bus Network Adapter: Warning: Missing SRV record at DNS server 10.2.100.121: _ldap._tcp.gc._msdcs.mydomain.com Error: Record registrations cannot be found for all the network adapters
TEST: Records registration (RReg)
Network Adapter  Microsoft Virtual Machine Bus Network Adapter:
Missing SRV record at DNS server 10.2.100.121:
Error: Record registrations cannot be found for all the network adapters
Is it reported on the branch side SRC revord lookup _tcp._ldap.msdcs.domain.loOn BranchDC1, there is a SRV record in Forward Lookup Zones/mydomain.com/_msdcs/
cal SRV record as preferred?
Usually, when moving, there is no need to remove the system from the AD, but simply move and then it will reestablish a connection. ....