I've brought up a second Exchange 2003 server in my organization.  The old
one allowed OWA access through the firewall.  It's still online and
operational.

The new server won't allow access through the firewall.  I can access either
from within my DMZ or from within my trusted side, but can only see OWA on
the old one from outside the firewall.  For reasons I haven't had time yet
to address, we're not using SSL (that will change soon, but I'm up to my
eyeballs fixing long-standing problems now that my old boss left).

The final thing here is that until Wednesday, the new server WAS allowing
OWA access.  Wednesday morning, it stopped...
I spent all day comparing configs on both.  By late evening, I gave up and
went to bed.  When I woke up the next day, OWA was open again!?!?!

All was well yesterday (Thurs) and then this morning, OWA stopped again.

Both mornings, it stopped around 7:30am - 8:00am.  Not that I'm sure that
that matters - I'm trying not be get superstitious about this.

Anyway, there's nothing in my event log that points to anything happening
when OWA became inaccessible.  I'm really at a loss and not sure where to
look?

Suggestions are VERY welcome at this point  :-)

Thanks,
Mark