We have Windows 2003 AD network and are upgrading to Windows 2012 AD network. We have two old DCs (Windows 2003) and we've created two Windows 2012 DCs. Also we transferred all DC functions to the new DC including 5 roles, dns, dhcp, ldap and what we can think about. Currently we've shutdown one of old DCs (it is not the main one) without any issue. Then we shutdown the last old dc (it is a first DC in domain and forest). We are experiencing:
Users feel slow response on their pc. Example, when I type cmd, take me a long time to open it. Also users feel slow to open and save files on servers. when I open Users and Computers AD tool, it takes a long time to open on new DC.
We received the event log 1112:
The Group Policy Client Side Extension Folder Redirection was unable to apply one or more settings because the changes must be processed before system startup or user logon. The system will wait for Group Policy processing to finish completely before the next startup or logon for this user, and this may result in slow startup and boot performance.
Also the event log 36887: A fatal alert was received from the remote endpoint. The TLS protocol defined fatal alert code is 48.
Thank you very much in advance.