I will try explain it better.
Scenario1:
Master DC and Slave DC (network 192.168.100.X and 192.168.200.x)
User xpto1 loggon on windows computer (network 100.X). the folder /home/xpto1 is created in both servers (via samba drs i guess)
User xpto2 loggon on windows computer (network 200.X). the folder /home/xpto2 is created in both servers (via samba drs i guess)
Scenario2:
Master DC and Slave DC with role RODC (network 192.168.100.X and 192.168.200.x)
Change slave role to RODC, running joining scripts again
User xpto1 loggon on windows computer (network 100.X). the folder still exists in both servers
User xpto2 loggon on windows computer (network 200.X). the folder still exists in both servers
Create user xpto3 in Master DC.
User xpto3 loggon on windows computer (network 200.X). The folder is created in the master DC and not replicated/created in slave server, the user is logged in master dc and not in the slave that is the near domain controller.
Maybe i’m wrong but i’m assuming that the user can’t login in the slave server because the folder doesn’t exist…