VAMT 3.0 Duplicate Client Machine ID Report showing excessive number of computers

Question

We are running a KMS on a 2008 R2 VM with plenty of CPU, RAM and storage.  I recently configured and installed the Volume Activation Management Tool 3.0.  Everything seems to be working well except that reviewing the Volume License
Reports, specifically the Duplicate Client Machine ID Report, I noticed an excessive number (about 4 times the number of actual managed computers) are listed in this report node. Even assuming that computer images were not being sysprep'd this
seems really odd.  The License Overview shows 1,813 licensed and 1,678 unknown (possibly off or disconnected devices) and our duplicate CMID report shows about 8,300 plus.  What are the possible causes why this number is so high and how do I troubleshoot
and remediate inaccuracies? 

Answer 1

Duplicate CMID can come if you didnt used /generalize option when sysprep'ing. (http://blogs.technet.com/b/askcore/archive/2009/10/16/kms-host-client-count-not-increasing-due-to-duplicate-cmid-s.aspx)
Please check your KMS's log, to be sure if true or not. If duplicate, it will be logged by your KMS's host.
In virtual, like XenDesktop or View with a golden image it can easilly happen, as the CMID is kept by the server for the virtual's machine (aka the PVS for XenDesktop)
Regards, Philippe
Don't forget to mark as answer or vote as
helpful to help identify good information. ( linkedin endorsement never hurt too :o) )
Answer an interesting question ? Create a
wiki article about it!
Hi Yagmoth555, thanks for the reply.  I know this is not the case for our environment as it's telling me that physical systems that were installed with the ISO have duplicate ID's.  Also, the previous version of VAMT that we were running didn't show
1,560 systems as having the same ID.  I have already deleted every "product" from the database and rescanned our environment, but I get the same result.