This morning, we are not able anymore to access OWA, either remotely or directly from the network. We get the OWA login page ok, but after entering the username and password, we get the following error:
"... The website declined to show this webpage. Most likely cause: This website requires you to log in"
"Information: The error (http 403 Forbidden) means that Internet Explorer was able to connect to the website, but it does not have permissions to view the webpage."
Any idea how to fix this ?
Note:Some tasks done before realizing this problem (in case it might help troubleshoot this issue):
1) Yesterday: We had to force the server to power off and reboot, and it seemed to have restarted properly. Any link with this event maybe...
2) Yesterday: Had to create a temporary web site in IIS to generate a CSR in order to purchase a SSL certificate from Verisign.
3) This morning: I installed Lansweeper this morning on the server. Install ran fine but could not access the web console after install completed. I then checked OWA and noticed it was not working either.