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You can apparently make static port mappings on Exchange Server:
 
http://support.microsoft.com/default.aspx?scid=kb;en-us;270836
 
And then you have to do it to the clients too, so you'd have to find a port range that was open at the ISP level...  For those who haven't used this - really handy (free) tool for scanning - SuperScan:
 
http://www.foundstone.com/resources/scanning.htm
 
     Rob Neary
     Senior Computer Systems Specialist
     Medical School Information Systems
     email: [log in to unmask]
-----Original Message-----
From: MSU Network Administrators Group [mailto:[log in to unmask]] On Behalf Of Skutt, Tim
Sent: Tuesday, September 02, 2003 12:16 PM
To: [log in to unmask]
Subject: Re: Outlook in Corporate Mode Not Working

Kim, I'm amazed that your users were able to get in with Comcast.  I haven't been able to get into our Exchange 5.5 server from at home since the blocking of protocols at the campus border. I had to switch outlook to IMAP mode and subscribe to my other folders in order to use it at home with Comcast.  Outlook uses port 135 for the login in MAPI (corporate) mode.  I wonder if there is any type of filtering that could be done to allow MAPI traffic only on port 135?  Or will we be lucky enough and Microsoft won't need to use port 135 with outlook/exchange 2003?
 
Tim
 
 
-----Original Message-----
From: Pierce, Kim [mailto:[log in to unmask]]
Sent: Tuesday, September 02, 2003 12:10 PM
To: [log in to unmask]
Subject: Re: Outlook in Corporate Mode Not Working

We have the same type of problem you are experiencing.  It was working sometime this weekend but as of yesterday it stopped.  All our users have comcast.
-----Original Message-----
From: Margaret Wilson [mailto:[log in to unmask]]
Sent: Tuesday, September 02, 2003 11:57 AM
To: [log in to unmask]
Subject: Outlook in Corporate Mode Not Working

I have an MSU DSL connection, hence a 35.11.x.x IP address.  Sometime within the last few days, Outlook in corporate mode has stopped working for me.  I get prompted for a password, and then after a l-o-n-g pause, I'm told my Exchange Server is unavailable.  I'm then prompted to work offline, retry or cancel.  I've checked with Health Team IS (who manage the Exchange Server) and am told that they have changed nothing recently, and that the server is working fine.  What's the status of campus port blocking?  Any idea why I can no longer use Outlook in corporate mode?  I have users complaining about this too.
 
Thx!
 
Margaret
--
Margaret Wilson, MCSE
Manager
Colleg of Human Medicine Information Systems
Michigan State University
517.355.1839