RWWGuard is not designed to protect OWA directly, however this workaround will redirect the OWA logins to RWW.
Open C:\Program Files\Exchsrvr\exchweb\bin\auth\owalogon.asp with Notepad.
After the line that says <% Language=VBScript %>, add the following:
<% ' Added to force user to log onto RWW-Guard before accessing email remotely Response.Redirect( "/Remote/" ) %>
This will force a redirect to the RWW-Guard logon before allowing people to access OWA.
Note: These steps are for RWW running on SBS 2003. For RWW on SBS 2008, please see the SBS 2008 version of this article.
If you have any questions or need some help, we would be happy to assist. Open a case at kaseya.zendesk.com .