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Can't connect to Exchange 2003 after installing ISA 2004

Hey,

We have recently tried to install ISA 2004 onto our SBS2003 server. The installation is succesful but when we then go to the clients and try to connect, it won't connect to Exchange server. We've tried removing a reinstalling it, clearing the rules, creating custom rules, updating the server but we can't seem to get the clients to connect. But, outside the building we can connect fine as I created an outlook profile on an external PC and VPN'd in fine and could connect to Exchange as normal.

Has anyone had a similar issue or know of a starting point to trouble shoot this issue? The server is mission critical so we can only troubleshoot it out of office hours which is adding to the problem.

Any help is much appreciated,

Thanks.

P.S I tried to add this under ISA zone but it kept saying 'not valid'

jacodalet

check the firewall settings on the server as this is the cause of the problem

ConanUK

ASKER

Can u be specific please, I have checked these and at the mo we've not got ISA on at the mo so I assume you mean Windows Firewall. I've checked that port 25 is still open as I'm assuming that what Exchange uses to communicate over.

jacodalet

You can stop all services of ISA but the problem will still exist, had the same problem 2 weeks ago stop all services and could not received mail, had to uninstall ISA to get this sorted.

Have to remember that if your rules are not configured correct your mails will not work.

ConanUK

ASKER

As I said before ISA is already uninstalled as it stopped the company receiving mission critical emails. The rules were the default rules from a standard isa 2004 installation on an sbs2003 then I created my own to make sure all internal traffic was allowed to test but the problem still occurred.

Philip Elder

Did you run the Configure E-mail and Internet Connection Wizard (usually fires right after install/uninstall)?

If not, or errors were had, run it again: SBS Console --> To Do --> Connect to the Internet.

Also, if you have a gateway appliance or router verify that the SMTP port has not been closed or the port forward rule has been disabled.

Philip

ConanUK

ASKER

Hi Philip,

Yes I've done and checked both. CEICW has been ran with no errors (a fair few times by now) and port 25 is open.

Thanks.

Philip Elder

ISA 2004 can live log for you.
ISA console --> Monitoring --> Logging --> Start Query.

Please verify that your network is set up correctly:
NIC 1 (SBS)
192.168.99.254 IP
255.255.255.0 Subnet
192.168.99.254 GW
192.168.99.254 DNS1

NIC 2 (ISA/DSL Modem - provided by ISP)
66.77.88.99
255.255.255.224 Subnet
66.77.88.1 GW
192.168.99.254 DNS1 (SBS server)

In the Network Connections window, click on Advanced and make sure the LAN NIC is on top of the WAN NIC. See screenshot.

Verify in the ISA configuration that your internal and external networks have the correct subnets.

Might want to start fresh with ISA and SP3.

Philip
09-03-16-SBS-NIC-Order.PNG

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ConanUK

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Philip Elder

The CEICW would fix those settings up.

Philip