If I use Set-OWAMailboxPolicy -OwaLightEnabled $false -Identity Default
to disable OWA Light, anyone who has gone in to display settings -> Outlook Web App Version and selected OWA Light is then presented with a "Can't access Outlook Web App" error page if they try to log in (Actually, anyone using the same browser will see this as this error will now be the cached page when they go to OWA). Is there a way for an administrator or the user to reset their preference short of the administrator allowing the user to access OWA Light and the user changing their preference?
Adding owa/?layout=premium
to the URL doesn't seem to do it.
Best Answer
I found an answer here: http://community.office365.com/en-us/f/158/t/75823.aspx
That seems to clear out the OWA Light preference, though, if it's done after disabling OWA Light the browser will still show a cached copy of the error page.