Office 2010 and KMS server

We have a volume license agreement with Microsoft and use a KMS server to activate all our Windows and Office installations.  As of late, we are getting errors that Windows and Office cannot be activated.  When we run the slmgr command from the KMS server to check, the KMS count is not increasing when we add new Windows 7 machines or try to activate Office.  What could the problem be?
WPincusITAsked:
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als315Commented:
You can install VAMT 2.0:
http://technet.microsoft.com/en-us/library/ff686876.aspx
and activate Office 2010 from this tool.
You can also look for possible problems there.
May be you are cloning your systems?

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WPincusITAuthor Commented:
That tool looks very useful.  We are not cloning our systems, they are built from MDT without a base image.

This process was working until last week so I'm thinking that something happened with the KMS server.
als315Commented:
You may also have problems with DNS record for KMS server:
http://technet.microsoft.com/en-us/library/ff793405.aspx
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