Hi John,
I don't believe such a way exists from Prov Manager. I think all that Prov Manager will or perhaps may be able to do is create an account or associate it with a global user. I don't believe you can actually flag the account with the NOPASSWORD that you mentioned.
However, I am unsure - I would kindly suggest that you open a support case to follow up with a support engineer.
Thanks,
Sagi