Cisco ISE and NDES?

Wanting to use Cisco ICE in front of Windows Server 2012 or R2 NDES.  The following article states that NDES should NOT be clustered or load balanced and setting a single password is not supported.

https://social.technet.microsoft.com/wiki/contents/articles/12610.network-device-enrollment-services-ndes-frequently-asked-questions-faq.aspx#Can_I_use_a_Static_Passphrase_across_multiple_NDES_servers_and_then_load_balance_them

The Cisco article says to disable the password altogether and lock the IPs down to the ISE devices in IIS that will access NDES.

http://www.cisco.com/en/US/products/ps11640/products_tech_note09186a0080bff108.shtml

If NDES is configured this way and dedicated to Cisco ISE will this be a supported configuration by Microsoft?  If the password is turned off altogether can two NDES servers then be load balanced as the password generation is not an issue.

Thanks