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Customization of Windows guests fails with the error: Customization of the guest operating system 'windows7Server64Guest' is not supported in this configuration

Today when one of my client was deploying the vm from template then it was failed with this error message 
"Customization of Windows guests fails with the error: Customization of the guest operating system 'windows7Server64Guest' is not supported in this configuration" 

Possible Causes:-
1. VMware tools are not installed in the source VM or Template. Install VMware tools or Upgrade VMware Tools
2. vCenter is not running with the correct version that can support the OS version. Upgrade your vCenter.
3. In NFS datastore "no root squash" is not enabled. Enable it.

Root Cause in my environment:-
VMware Tools were not installed.

Source KB:-
https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1020716 

Setting Up VMware Horizon 7 True SSO

With True SSO, a user can log into Identity Manager using any non-AD method (for example, RSA SecurID credentials) and once authenticated, the user is able to launch any entitled desktop or app (hosted from any domain) without ever being prompted for a password again!

True SSO uses SAML (Security Assertion Markup Language) to send the User Principal Name (for example, jdoe@example.com) to the identity provider’s authentication system to access AD credentials. Horizon 7 then generates a unique, short-lived certificate for the Windows login process.

Image thanks to VMware

Related Articles:-
http://blogs.vmware.com/euc/2016/03/true-sso-single-sign-on-view-identity-manager-authenticate.html
http://blogs.vmware.com/euc/2016/04/true-sso-setting-up-in-a-lab.html