Need to change admin password - any known gotchas?, common mistakes?

My primary concern is that some service/feature will stop working
because I have not changed the password for that service/feature, i.e.
GroupWise, GroupWise webacceess, web-based file access

We have a NW SBS 6 main server
NW 6 web server running only the groupwise webaccess
NW 6.5 server running web-based file access

Does anyone know if there are files I will need to modify the admin
password in?