I've put a password policy in place assigned to the Login Policy.
In advance of the password policy, the 4.91 SP2 client was rolled out
via Zenworks.
On some PCs the "Challenge/Response Administration" link from the system
tray icon is still returning the "Cannot administer Challenge/Response
because the user doesn't have a Challenge Set assigned, or the NMAS
client needs to be updated".
I've verified that the policy has been assigned to users via the "View
Policy Assignments" link in iManager 2.6
I've reinstalled the client from scratch as well as removing and
reinstalling the NMAS client without any luck.

Any suggestions welcome.
Many Thanks,