Changing usermapper to secondary

Hi Guys,

Got two celerras that host CIFS shares, and have replication going both ways for DR purposes. It has occured to me that 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.

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?

Also, i'll be changing the nanosecondroundoff parmater to 1, on the data mover before restarting the CIFS service, so i don't get problems with performing robocopies of data durring migrations. Does this need to be implemented on the standby data mover as well?