how to change the usermap from two primary to one primary in DR scenario

two ns480（cifs） in replication  scenario and the usermapper configuration has been set up incorrectly, and both celerras have primary usermappers. I now need to set one of the usermappers to secondary. just like the change pic1  to pic2.

below is my plan to convert :

on ns480（downtime）

1. server_usermapper server_2  -E –u /home/nasadmin/1.txt

on ns480DR

2. server_usermapper server_3  -I –u /home/nasadmin/1.txt

on ns480

3. server_usermapper server_2 –disable

4. server_usermapper server_2 –enable primary= IP_ns480DR_server3

Although I know how to do this, I need to know:

Will this affect the permissions of the CIFS shares hosted on the Celerra I will change?

Will this cause any other unforseen problems?

Do I need to consider the secmap  or other things？