RE: client behind ISA access to remote Exchange behind another ISA using MAPI

  • From: "Steve Moffat" <steve@xxxxxxxxxxxxxxx>
  • To: "Isa List" <isalist@xxxxxxxxxxxxx>
  • Date: Thu, 6 Mar 2003 01:41:02 -0000

Hi John

They're not ISP's, but mail hosting companies.

I know of 2 companies here in Bermuda that use them, one's a large
insurance company, (over 500 users here), with office's here, the
Bahama's and Cayman, the other is a small office with 5 users, the 5
user office pays $39US a month for their mail hosting, don't know how
much the insurance company pays

The benefits are no hardware costs, no os/costs, no exchange cost, no
upgrade costs, 24/7 365 days a year uptime guaranteed, full back up
solution.

Search on google, you'll find a few....:))

Steve

-----Original Message-----
From: Greg Mulholland [mailto:greg_mul@xxxxxxxxxxxxxxx] 
Sent: Thursday, March 06, 2003 1:22 AM
To: Isa List
Subject: [isalist] RE: client behind ISA access to remote Exchange
behind another ISA using MAPI


http://www.ISAserver.org


Maybe im old fashioned but in that situation I would prefer to have the
control over it myself. That way you could hopefully use it to its full
potential

And come to think of it I can recall people that do it, I just wouldn't
prefer it.

Greg



-----Original Message-----
From: Greg Mulholland [mailto:greg_mul@xxxxxxxxxxxxxxx] 
Sent: Thursday, March 06, 2003 12:07 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: client behind ISA access to remote Exchange
behind another ISA using MAPI

http://www.ISAserver.org


They are available no doubt. I couldn't think of a real reason to use
them in a corporate environment, which is what I think John was getting
at. Maybe if money is an issue, but if it was then exchange is the wrong
option I would think

Greg

-----Original Message-----
From: Steve Moffat [mailto:steve@xxxxxxxxxxxxxxx] 
Sent: Thursday, March 06, 2003 12:01 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: client behind ISA access to remote Exchange
behind another ISA using MAPI

http://www.ISAserver.org


Hi John H

I would imagine, that if it's not a configuration with your isa server,
then it's a problem with the isa server config at your mail hosting
company.

Hi John T,

There are literally hundreds of outsourcing mail servers on the web that
use exchange, and will host all your email services for a few dollars a
month.

Thenks!!

HTH

Steve

Read the books

-----Original Message-----
From: John Tolmachoff [mailto:isalist@xxxxxxxxxxxx] 
Sent: Thursday, March 06, 2003 12:50 AM
To: Isa List
Subject: [isalist] RE: client behind ISA access to remote Exchange
behind another ISA using MAPI


http://www.ISAserver.org


This is interesting. See my reply to 307926.

In your case, is a site to site VPN possible? (It would have to be
strictly
regulated.)

In my opinion, Exchange was never designed nor will it function properly
to serve as a mail server for non-local domains. It is the Lexus of
corporate e-mail servers. The key word is corporate.

If you have to have Exchange and you have to outsource, I would
seriously consider a on-site outsourced Exchange server, where it is in
your office but is entirely taken care of by someone else.

I have never heard of Exchange being used for a corporation where the
Exchange server was not within that company.

John Tolmachoff MCSE, CSSA
IT Manager, Network Engineer
RelianceSoft, Inc.
Fullerton, CA  92835
www.reliancesoft.com


> -----Original Message-----
> From: John Huang [mailto:jun@xxxxxxxxxxxxx]
> Sent: Wednesday, March 05, 2003 1:17 PM
> To: [ISAserver.org Discussion List]
> Subject: [isalist] client behind ISA access to remote Exchange behind
another ISA
> using MAPI
> 
> http://www.ISAserver.org
> 
> 
> Hi, Dr. Shinder:
> 
> Our LAN is behind a integrated mode ISA. We are using SNAT client for
> LAN. Now we want to use outsourced Exchange, which also secured 
> published behind ISA array. I am using Outlook 2002 SP-2 client, try 
> to connect using MAPI to the remote Exchange but failed. Someone told 
> me installing the lastest Feature Pack 1 but still not working. I 
> tested by allowing my ISA wide open to all to try to connect the 
> remote Exchange, still failed. Errow message said can not find the 
> server and the mailbox name. Using sniffer to analyze the packet find 
> that local Outlook client send some request call but not get reply by 
> the remote Exchange but ISA, while if not SNAT in DMZ the client can 
> get the reply and establish MAPI connection.
> 
> After dig out some knowledge base, I found these info:
> http://support.microsoft.com/default.aspx?scid=3Dkb;en-us;307926
> http://support.microsoft.com/default.aspx?scid=kb;EN-US;263293
> http://support.microsoft.com/default.aspx?scid=kb;en-us;154596
> 
> Is this mean that we can not use this kind of sevice or setup because
> of the RPC, NAT and Outlook GC? Any suggestion? or the beta 2 version 
> of ISA will address this problem?
> 
> Thank you very much for your advice.
> 
> 
> Best regards,
> John Huang
> System Administrator
> 
> 
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