Server 2012

  First we will see what is USN? Microsoft says.. Every domain controller maintains a USN that is specific to that domain controller. Whenever a change is made to Active Directory from that DC, the USN is incremented by 1. So if a DC has a USN of 1000 at 11:00 a.m., and 1005 at…

Read More What is an Update Sequence Number aka USN and how to check it on the DC

If you are trying to add certain roles/features in Windows Server 2012 you will see the below error. “Do you need to specify an alternate source path? One or more installation selections are missing source files on the destination server. The server will try to get missing source files from Windows Update, or from a…

Read More How to resolve source file missing error while adding features/roles in Server 2012