Was working fine completely yesterday. Woken up this AM by customers complaining about not being able to access webmail. Double check all settings / auth and everything seems to check out.
After logging in a user will see "Loading..." in the name of the browser window with a blank white page.
I have searched extensively but none of the top fixes seem to be working for me, I have checked via Exchange Connectivity Tester
I am trying to dump the tester link but it is telling me I cannot post images.. I am only posted the copy/paste code.