Hi,
Hariharan
There may be many places to change user names depending on your settings.
First, does it include the user running QV server services? In this case, you need to adjust that ( run services.msc on the server to check and change the users)
On the server, first you need to change your users cals. You may have problems with the quarentine. When you remove a user, the user cal will only be available after 24 hours.
If you also have documents cals, you need to to to each document on the document settings and change the users there.
If you use DMS, you will need to change all the document authorizations.
If you have section access based on the domain name, you will need to fix that on all the documents.
Hope this helps,
Erich
