We have a SEPM 11 manager that we are migrating machines onto a new SEPM 12 server. what we did was we built the SEPM on the new server to the same version as the old SEPM and setup up replication so groups and policies were copied over to new SEPM once complete we severed replication and upgraded the new server to SEPM 12.1 RU4 MP1b.
I've been pushing communication update packages from the new SEPM server to the clients to repoint them at the new SEPM and once checking in they are then auto upgrading to SEP 12.
What I am seeing in some places though is machines checking into both SEPM's at the same time. one SEPM 11 manager will shout the client still on SEP 11 and the SEPM 12 will show the client on SEP 12 but both are checking into both SEPM's recently. Has anyone seen this before or understand why this is happening.
A couple of these can be explained as they are citrix environemnts and when re imaged they re-image back to SEP 11 as the main image hasn't been updated. But can't understand why the laptops that aren't citrix are doing this.