We have an Office 365 account.
with 'Ralus.be' being the main domain.
ralusbvba.onmicrosoft.com as the original microsoft made domain.
I can not set up my outlook on a user's computer with this domain (firstname.lastname@example.org).
We have another office 365 account with a domain, this DOES work on this computer.
I even tried setting the ralusbvba.onmicrosoft.com as main username and emailadress but even then it isn't working.
When i use another (personal) workstation -outside the company - this works perfectly (both the ralus.be and the onmicrosoft.com domains)
dns, autodiscover, testexchangeconnectivity are all working (since i can set this up on another computer)
pinging to autodiscover on the computer also resolves correctly.
Even if i set up the server connection manually (exchange server and outlook over http) this is failing.