Here is my situation. We have moved all our users over to 2013. At this time, we just us IM and Presence. No conferencing. I have a single 2010 Std Edition server with a local CMS. I moved the CMS to 2013 last week but a replica is still on 2010. The Microsoft article that I used to move the CMS to 2013 says I should remove the CMS from 2010.
Here is the thing though. We are still using the 2010 Edge box as we have not had a chance to update it yet. Our next hop on the Edge is 2013 so 2010 should be out of the picture. I was afraid to remove the CMS from 2010 thinking that the Edge still needs it. Our 2013 FE is now the Master replicator so the Edge is getting its update from it.
I know it sounds silly but I did not want to disturb the Edge in any way even though it is not used that often. Not sure if I should wait until I decommission the 2010 Edge and move to 2013 before I remove the CMS from 2010 and decom the 2010 FE?