When you remove a user who is assigned to a primary device in Microsoft System Center 2012 Configuration Manager Service Pack 1 (ConfigMgr 2012 SP1), all policies that are assigned to the device are removed. This issue occurs even when there are other users who are assigned to the device.
For additional details regarding this issue as well as a link to a Configuration Manager hotfix that resolves this issue, please see the following:
KB3011390 - Device policies are removed unexpectedly in System Center 2012 Configuration Manager SP1 (http://support.microsoft.com/kb/3011390)
J.C. Hornbeck| Solution Asset PM | Microsoft GBS Management and Security Division
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