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Hello, My company is using SCCM 2012 SP1 (5.0.7804.1400) and using SCCM's functionality for deploying Windows updates to workstations and servers. Over the past weekend, one of our critical servers restarted itself unexpectedly. It is a Windows Server 2008 R2 server that is part of a collection that has a defined maintenance window for installing updates. This restart occurred outside this maintenance window and the WindowsUpdate.log on the machine states: "AU scheduling auto reboot check since no user is logged on and reboot is required." I have searched for this issue online and it appears others have encountered it. Some posters have suggested that perhaps SCCM is telling the server one thing (i.e. stick to the maintenance window) yet Windows Update on the server itself is perhaps giving the server a different answer. Some have suggested that a change to Group Policy to prevent this Windows Update behaviour might be necessary. To summarize - should I have faith that a server will follow ONLY the policies from SCCM or are there other sources of Windows Update/SUS instruction that I have to consider? Comments most appreciated.