I seem to recall having seen a recommendation that Exchange be
installed on a BDC (Exch 5.5, NT4 environment), but I can't find
such a document that clearly explains why. I can think of two
1) removes any "local" users on the machine, which might help to
2) ensures that a copy of the SAM is always available.
On the other hand, I can think of reasons why it might not be best,
such as performance, security (perhaps), recoverability, and just
plain "common sense": why do it unless you must? Would somebody
please point me to a clear answer?