Last night at 11PM our WSUS server synchronized with Microsoft Update and sent me an email to inform me that it saw a new update available: http://support.microsoft.com/kb/970789
When I go into my WSUS console this morning and try to approve that update, WSUS reports "The selected update has expired and cannot be approved for installation. It is recommended you decline this update."
When I bring up the update status summary report for this update, it shows that my approval summary for all groups is "Not Approved."
Yet when I go look at the MSKB article, it does not seem to indicate that this update has been rescinded or superseded by another update?
Why did this update expire and auto-decline at some point in the 9 hours since the system discovered it's existence?