Hi,
Thanks for posting in the forum.
Regarding the current issue, since you have received the error Online - Data Retrieval Failures Occurred in Server Manager after upgrading to Windows Server 2012 R2, I suggest you could refer
to the following article to see if it could work. As it mentioned, the issue may be related to a bad upgrade Routine.
Tip: Fixing Windows Server 2012 upgrade to Server 2012 R2 Data retrieval issue in Server Manager
http://blog.cloud-client.info/2013/09/27/tip-fixing-windows-server-2012-upgrade-to-server-2012-r2-data-retrieval-issue-in-server-manager/
In addition, regarding the error message in DC1, please try to refer to the following article for troubleshooting.
Windows Server 2012 - Server Manager Troubleshooting Guide, Part III: Common Events and Errors in Server Manager
http://social.technet.microsoft.com/wiki/contents/articles/13445.windows-server-2012-server-manager-troubleshooting-guide-part-iii-common-events-and-errors-in-server-manager.aspx
Hope this helps.
Best Regards,
Andy Qi
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