This may not be the forum for this question , if not please direct me to the
proper one.

We are a Netware 6.5 (SP5) shop. What sort of difficulties would we run into
(security, performance, management issues, etc) having the users login into
AD as well and through the Netware client (not CIFS)?

Some users are on going through the Internet via VPN to the Netware servers
at present and would also have to connect via the same VPN for AD.