1. Open IIS manager on the Client Access Server
2. Click on “Default Web Site”
3. Click on “HTTP Redirect”
4. Check “Redirect requests to this destination” and enter the absolute path to OWA, Also make sure you check “Only redirect requests to content in this directory (not subdirectories)” . Make sure the selected status code is “Found (302)”. Then click “Apply”.
5. Because any redirection configured on the “Default Web Site” is propagated to the lower-level virtual directories (vdirs), you must remove the redirection setting on all existing vdirs. You do this by clicking on each vdir and from here on the “HTTP Redirect” button. Now simply uncheck “Redirect requests to this destination” followed by clicking “Apply”.
6. last thing to be done is disable the SSL requirement on the Default Web Site
7. On the SSL Settings page, uncheck “Require SSL”.
Note: If you don’t uncheck the SSL requirement, you will get an HTTP 403 Forbidden: Access is denied error.
