they won't be affected until you deploy the EEPC6 package to them - then they will upgrade.
we are in a same position.
My recommendation is to test thoroughly first in a test environment and then run a side-by-side pilot, i.e., gradually deploy EEPC6.1.
For some reason policy enforcement is taking long on my machines.
I would recommend waiting for EEPC 6.1.1. This version will preserve your pre-boot user passwords and SSO details as part of the upgrade. Currently this is in the "release to support" stage, which means it only goes to select customers but it should be generally released in a week or two. Read the migration guide that comes with that release for more details on the exact upgrade procedure.
Thanks for providing this update.
Is there a release date for 6.1.1 yet?