Decommissioning a domain controller – Possible Scenarios Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Server Operating Systems › Windows Server 2012 / 2012 R2 › Decommissioning a domain controller – Possible Scenarios This topic has 3 replies, 4 voices, and was last updated 6 years, 4 months ago by kjsmithtx. Viewing 1 post (of 1 total) Author Posts popeMember Jun 26, 2014 at 9:05 am #163915 Hello, I am in the process of upgrading my window server 2003 to 2012 R2. I have introduced a swing DC,installed 2012 on it,ensured that replication is occuring between the two and succesffully transfered the roles from the old DC to the new temporary 2012 DC. Refer to this thread for the procedures in use http://forums.petri.com/showthread.php?t=63803 Now i intend to decommission the old 2003 server , and to a fresh reinstallation of 2012 in it,then once i ensure replication has occured, transfer back the roles and decommission the swing DC Both server are global catalogs.. My question is this, Do i just do a fresh reinstallation of the 2012 on the old server 2003 without first demoting it? or do i demote it ,test and then install 2012 on it… Since the servers are GC both,is there a possibility that when i demote the old DC the DNS,AD details that had replicated dissapears? What any other cautions should i check? Thanks Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.