outlook 2003 connection problems with exchange server

35 pts.
Microsoft Exchange 2003
Microsoft Outlook
Microsoft Outlook 2003
VPN Tunnel
We are about to use the Exchange server from a parent company. We created VPN tunnels between their CIsco routers and our netscreen ones. I can ping the exchange server with its IP address and also with its name ( email.domain.org ). When I set up the email account I enter the IP address in the exchange server name and I am able to connect. Once the names are checked and the server name is changed from its IP address to its name it won't connect any more. Our subnet is with DHCP server and DNS servers and Any ideas will be appreciated, thank you.

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Thank you for your replay wrobinson,
Yes, OWA works, even from my home using PPTP
. We actually have 8 sites that are going to use that exchange server, 7 of them have the netscreen in our side . The 8th one has a CIsco ASA managed by them, this one works but athe difference is that in that site we get the DHCP from the router because there is no server there Yet. AT the begining we have the same problem in that site but then they added another DNS server and it worked. I think we have a DNS problem but I can’t find out what is wrong yet.

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  • Wrobinson
    Do you receive an error? Depending on how your accounts are configured in the parent company, you may need to supply different credentials to access your mailboxes. You can try logging on to OWA (http://excahnge_server_name/exchange) to confirm that your credentials work. Instead of connecting through a firewall, the parent company might consider using RPC/HTTP(S) with Outlook 2003 in cached mode which allows you to connect to Exchange Server 2003 securely over the Internet.
    5,625 pointsBadges:
  • Exuardo
    I added the parent company DNS server to our DHCP and WINS and now Outlook connects.
    35 pointsBadges:
  • Limson
    Hi , Even We are facing similar problem. we have migrated our windows server 2003 enter to WK3 ent due to some Hardware issue. MX its located in different location (US), we have established VPN tunnel between my office to US office through Netscreen firewall. Outside users accessing mails outlook 2003 through RPC/HTTP. Before migration everything was working fine. After Migration internal users are able to connect outlook very fast. but whenever we try to connect outlook from outside the office network , it takes long time to connect to the server, but OWA its working fine. I have checked all RPC settings, Netscreen firewall settings and compared old server and new server configuartion everything is similar Anyone can help me?. is it could be the problem with MTU size or anything else?
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