Situation:
We have two CAS Servers as NLB cluster on Windows 2008
CAS1.contoso.internal
CAS2.contoso.internal
NLB has A Record in DNS: mail.contoso.com
OWA access works with https://cas1/exchange or https://cas1/owa or https://cas2/exchange or https://cas2/owa
To redirect incoming https://mail.contoso.com to one of the CAS Servers It’s a little different with IIS7.
· You need to go into inetmgr
· Select the default website
· Go to HTTP-Redirection
· Select first option and type only /exchange (or /owa)
· Then select 3rd option
· Save and close Inetmgr
(Sorry, only German Screenshot available)
HTTPS Redirection is similar
· Create SSLRedirect.htm according to below Technet Article and save to C:\inetpub\wwwroot
· Open intetmgr
· Select the default website
· Go to Error codes
· Add new Entry with Error code 403.4 (note the period instead of the semicolon mentioned in article)
· Save and close inetmgr
Note:
Double-check the HTTPS redirection URL in your SSLRedirect.htm. The article says https://%3cservername%3e/exchange .
But if you simplified the URL already according to the above settings you need to remove /exchange from the redirection URL here. (e.g.: https://server23 instead of https://server23/exchange )