error when using OWA access to mail server exchange 2010

Question

Suddenly it will come out the below error when accessing the exchange 2010 mail server using OWA after clicking sign in button on initial page?

***The website cannot display the page HTTP 500
Most likely causes: •The website is under maintenance. •The website has a programming error.

What you can try: Refresh the page.

 Go back to the previous page. 

 More information 

This error (HTTP 500 Internal Server Error) means that the website you are visiting had a server problem which prevented the webpage from displaying. For more information about HTTP errors, see Help.*

Any suggestion? Thanks!

Answer 1

On the exchange server, check the services list to check if all related services are running. If not, check the event log as to why they won't run.

Answer 2

I was having this same issue and the Microsoft Exchange Forms-Based Authentication Service failed to automatically start. As soon as I started up this service, OWA started working again.