Cannot get OMA to work, going to http://server/oma returns the error:
"A System error has occurred while processing your request. Please try
again. If the problem persists, contact your administrator"
Getting the 1503 errors in Event viewer.

I was wondering if it was possible to access the additional mailboxes via OMA as in OWA.
For example, I connect to my additional "Support" mailbox in OWA with this:
https://office.mycompany.com/exchange/support
I have already tested the following for OMA:

I've set up a brand new Windows Server 2003 with Exchange 2003 for a
new domain and gotten it configured properly so that email, calendar,
tasks, etc. can all be accessed through an Exchange connection in
Outlook 2003.

Hi, i have activate the form based flag on my server Exchange 2003 SP2.
After some hours (all go OK) i have: 440 Login Timeout
I have changed autentication in IIS but i must remove the flag to continue
read mail whith OWA.

  Suddenly my Cingular 2125 (WM5) is giving error "0x86000108" when it
tries to ActiveSync with my Exchange 2003 SP2 server. The server logs
don't show any issues, and restarting IIS & Exchange doesn't fix the
problem. Any advice/help is greatly appreciated. Thanks in advance.

We just setup a SBS 2003 with Exchange. The users can use OWA and OMA without any issues. Smartphone also works if we don't use SSL. SSL works on OWA and OMA. If we enable SSL on the smartphone, we will receive this error: "Your account in Microsoft Exchange Server doest not have ...

I setup Exchange 2003 SP2 and got OMA working, but now when I try to sync a
Treo 650 with Exchange 2003 SP2 using activesync I get the following error
on the Treo 650.
airsamstatemachine.c 2239 4 server returned unsuccessful status 4

I have outlook web access running on Small Business Server 2003. The
graphical user interface commes up nicely when i pull it up on our secure
sockets layer connection. However, after i log in, i see a directory
structure and there is no GUI. It was working fine for a long time. ...

I purchased a new Cingular 8125 Windows Mobile 5.0 device and have had it
for a couple of days. I have been trying to get the over-the-air Exchange
Activesync to work but have been unsuccessful. I have configured Activesync
on the device to point to the correct server and required ...

Whilst trying to get our Mobile 5 devices synching we now get Support Code:
0x8503001A. The device looks like it is communicating with the exchange
server, even shows the number of mails, eg. 0/203 but goes no further. The
folder structure is created but no messages are ever ...

I get a HTTP_440 error on my smartphone in Activesync when I try to sync
over the GPRS network back to our Exchange server.  However, it works fine
when I plug into the USB cable on my laptop which is connected to the
wireless network behind the ISA server.  The device then ...

Hi, just upgraded Exchange to SP2 (after applying hotfix 831464 as required)
and now Exchange Active Sync is broke.  OWA requires login in the format
domain\user instead of just the user that it required before.  I suspect
that the two are linked.

I'm about ready to give up on this one.  I hope you folks can pump some
life back into me on this because I really feel like the bleeding has
gone on too long for me to keep going.
Here's the rundown of the environment.

Quick question:
We have a 2003 SBS Standard server SP1, running Exchange 2003 SP2.
Just received some windows mobile handsets which we are trying to synch with
exchange using Active Synch version 4, devices running Mobile 5.

How can I use the active sync to sycnchronize to my exchange by port 443?