ConfigMgr 2012 R2 - CU4, Single Primary Site
Most applications I deploy are set as available deployments for users to install on demand. This week we have seen large numbers of clients requesting applications that have no required deployment, and forcing themselves onto client machines during the maintenance window, without any user requesting it. The applications are all deployed to a device collection, All Workstations. This collection contains over 12,000 clients. Only a handful between 300-5000 are requesting a specific application. For instance 300 are requesting Blackboard Collaborate app and 1000 are requesting Google Talk Plugin, despite only one deployment existing which is set to Available. Thought it was a fluke at first, but now many clients are doing it to various applications with very little consistency.
Other than CU4 being applied last week (tonight was the deadline of the CU4 client install), there have been no changes to the clients, site server, or any of the applications being requested and installed during the maintenance window. If I have no required deployment or supersedence, then how could they be getting installed without instruction by me or the user?
MS has been unable to help thus far. Anyone seen this sort of behavior before?