[dba-Tech] Microsoft Mail licensing issue

I am trying to compile a list of costs involved to purchase a new server for
a client. One part of it is to list costs that should have been paid with
the old server. For instance; they should have been paying for NT server
client access licenses (CALs).

They use Microsoft Mail and IIRC there are some licensing requirements to do
this that aren't actually enforced by the server (similar to CALS). Is this
correct?

JB