Thunderbird/ExQuilla - Zentyal - EWS

[MarkDH]

Hi i am having some trouble with the auto discovering of EWS with the ExQuilla plugin for Thunderbird.
The auto discovering finds an EWS URL, which looks like this https://mydomain.name/ews/as
But when it comes to the test of the EWS URL it fails.

Can anyone tell me if the EWS URL i get is the correct one, otherwise i can put it in manually.
But i cant seem to find any information about what the correct URL should be.
All i can find, is that normally it would look like this: https://mydomain.name/EWS/Exchange.asmx
But that doesn't work.