Windows Server 2012 R2 automatic restart after scheduled installation behavior

HI guys,

On a group of servers we have set the following GPOs and update the servers with our WSUS:

Configure automatic updating: 4 - Auto download and schedule the install
Scheduled install day: 3 - Every Tuesday
Wait the following period before proceeding with a scheduled restart (minutes): 5
Delay Restart for scheduled installations: Enabled

Unfortunately not all servers behave the same way on these policies.

All Windows Server 2008 R2 Server report this and restart successfully:
Restart Required: To complete the installation... the computer will be restarted within 5 minutes.

Some Windows Server 2012 R2 Servers report this and restart successfully:
Restart Required: To complete the installation... the computer will be restarted within 15 minutes.

Some other Windows Server 2012 R2 Servers report this but do not restart at all:
Restart Required: To complete the installation... the computer will be restarted within 15 minutes.

When I open the Windows Update Control panel it reports the following:
Restart_1day.JPGYour PC will automatically restart in 1 day if you don't restart now.

What is happening here?

Thanks a lot for any help.
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Mark LoganCommented:
My immediate thought is that either the GPO isn't applying, or that there is another GPO superseding the settings of the WSUS GPO you've deployed.  If you take two 2012 servers, one that is behaving as expected, and another that isn't, and do a GPResult /R you will get the output of the GPOs applied.  Compare the two to see if there are any differences (and ensure that your WSUS GPO is being applied)
windows-itAuthor Commented:
I found the problem. The issue has to do with the unequal restart behaviors after scheduled installation of Windows Server 2008 R2 and Windows Server 2012 R2. Further there is a new group policy ADMX which was not installed on the group policy central store and there is a GPO which does not work anymore on Windows Server 2012 and above.

Here a technet article:
Microsoft Technet: Enabling a more predictable Windows Update

On computers running the RTM release of Windows 8 and Windows Server 2012, Windows Update no longer defined when to install updates. Instead, Automatic Maintenance is used for that purpose, minimizing activity during active computer use. Windows Update on Windows 8 and Windows Server 2012 computers also has new restart logic that defaults to forcing a restart 3 days after the installation of updates instead of 15 minutes.

A new group policy called Always automatically restart at the scheduled time enables restarts soon after updates are installed, instead of 3 days later.

In Windows 8 and Windows Server 2012, the Delay Restart for scheduled installations continues to have no effect.

more details in the technet article.

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windows-itAuthor Commented:
Found the solution...
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Windows Server 2012

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