Another user account created....by the OS????

[ITnewbie]

I have recently been coming across a few PC's where a 2nd profile is created for 1 user and the profile has the domain name on the end like --> johnsonjoseph.domain
This is doesn't happen for joseph on every computer that he logs into. We are using Win7 Enterprise 64bit

 

[ITnewbie]

Normally our user profiles are created as lastnamefirstname.

 

[GokAy]

Would this answer windows - username.domain profile in AD environment - Server Fault?