You are right as per KB sysprep is not needed by vCenter for Win2008r2.
Found one more KB may be related this issue VMware KB: When deploying a Windows 2008 R2 template, the guest operating system customization does not complete
You are right as per KB sysprep is not needed by vCenter for Win2008r2.
Found one more KB may be related this issue VMware KB: When deploying a Windows 2008 R2 template, the guest operating system customization does not complete