On our Windows (all platforms) servers and PC's, running with SEP 12.1 RU2, some are randomly losing the Policy Serial Number in the SEPM console. After a week or two, the quantity gets quite large (dozens). I can correct by pushing down to these clients a Communication Update Package, and all is well. Except, after a few days, the issue pops up again and the numbers of client missing the Policy Serial Number begins mounting again. These clients still show with a green circle/check mark as healthy under health state, and have updated definitions.
On the client side, you see the green circle/check mark saying no problems detected, and updated defs. However, in the Troubleshooting portion of the GUI, the Group and Policy Serial Number are empty, and the location awareness is Disabled (Enabled is normal - normal clients have Group and Policy Serial Number populated as well). If I right click on the shield and click update policy, nothing changes.
Has anyone seen this? Any ideas what's going on and how to keep this from happening? Thanks!!