Your entry is wrong.

Look at the screenshots i attached.

Also make sure your clients use pfSense as primary DNS

@GruensFroeschli

Thank you soooooo much. I have been trying to figured out why i didn't see my own web server ;)

When I fild in IE https://myserver.local/exchange then I receive my login of OWA.
So if I create a subdomein on my hosted domainame then I can use that inside our outside my network.
Inside it will then rerouted to my server.

What I know try to do is connect a IMAP profile to my smartphone that I can sync Inside (LAN) and Outside (Internet) my network.

Ik think that this will be the solution. Thanks for your patience  ;)

Normaly I can put the WAN address of my modem in the Domain tab of the General Setup. , isn't.

No.
What you set here is the domain name you actually have on the WAN.
If you dont have a name just set it to something like "local" or "myLAN".
This name will be assigned as the domain to the clients that get their DHCP lease from pfSense.
Dont put numbers/IP's here.

Then I put in de Domain colom of the DNS Forwarder that WAN address. Will this then work or what shud I prepare.

Yes you put what you entered under domain in the general section here.
The IP field is the IP of your server.
The Host field can be left empty.

In my example: i have the domain "psymia.mine.nu".
If i enter "psymia.mine.nu" in firefox i access my server on 10.0.0.10.

I added a second entry with as host www:
If i enter "www.psymia.mine.nu" in firefox i access my server on 10.0.0.10.

I've setup the things like you posted (naturraly with mine issues)

But I've a question about it. I don't have ore use a subdomain to access my OWA.
Normaly I can put the WAN address of my modem in the Domain tab of the General Setup. , isn't.
Then I put in de Domain colom of the DNS Forwarder that WAN address. Will this then work or what shud I prepare.
I still hope to find a solution.

If you still can help me out with this. ???

Look at the screenshots i attached.

Also make sure your clients use pfSense as primary DNS

Here is a prtscr:


"the other solution" with a split DNS won't work.
I recveive the same error.

What do you mean it wont work?
Did you try?
Can you show a screenshot of what you entered?
I have this exact same setup here at my home (my modem doesnt provide bridging functionality)

"the other solution" with a split DNS won't work.
I recveive the same error.
Later this day I will try to put my modem into bridging mode, when everyone is out of office, otherwise my phone wan't stop to riiiiiing  ;D

(public IP))          (private IP)                (private IP)
internet --------- Modem-------------- pfSense --------------clients

You have to put your modem into bridging mode.
So you have a public IP on the WAN of your pfSense.

The other solution is you set up split DNS.
Go to the DNS forwarder config and add the adress you have on the WAN and set the IP to which you want to be redirected.

When I browse to my WAN URL (by example) http://80.81.82.83 then I get the login screen of my ADSL-router. When I try to connect my OWA https://80.81.82.83/exchange then I get an error by the proxy I think.

"Connection to 80.81.82.83 faild"
The system returnd:
(61) Connection refused

Any idea what I should do?

http://forum.pfsense.org/index.php/topic,7817.0.html