Cannot autodiscover Office365 @domain.onmicrosoft.com emails

[akshayrawat]

Exchange emails for an Office 365 setup with no custom domain are of the format user-name@domain-name.onmicrosoft.com. The gem incorrectly tries to find the autodiscovery URL at domain-name.onmicrosoft.com.

[martini]

Same here, the reason is that the autodiscover gem tries to probe the following urls:

1. https://znuny.onmicrosoft.com/autodiscover/autodiscover.xml
   -=> Unfortunately Microsoft is not serving AAA records for this kind of sub domains, so the autodiscover gem dies with "SocketError" and is stopping probing

2. After modify in autodiscover gem to not stop, it tries https://autodiscover.znuny.onmicrosoft.com/autodiscover/autodiscover.xml
   -=> Unfortunately Microsoft (ans also other hosted exchange provider) are not serving https resources for that, only http resources. Anyway, the autodiscover gem dies with " Errno::EHOSTUNREACH" because "https://autodiscover.znuny.onmicrosoft.com/autodiscover/autodiscover.xml" is returning with connection refused.

Solution: Microsoft and other hosted exchange providers serving non https resources like "http://autodiscover.znuny.onmicrosoft.com/autodiscover/autodiscover.xml" which do an redirect to correct https resource, in this case to https://autodiscover-s.outlook.com/autodiscover/autodiscover.xml which is returning the EWS URL correctly "https://outlook.office365.com/EWS/Exchange.asmx".

So the autodiscover gem need to get improved to handle autodiscover this way.

[thorsteneckel]

I created the pull request #9 for fixing this issue based on the work of @martini this morning. If the newly added exceptions get skipped the gem actually tries requests for the http domain:

available_urls gets looped:

autodiscover/lib/autodiscover/pox_request.rb

Line 18 in e3bcbf6

available_urls.each do |url|

available_urls yields the redirected_http_url after the HTTPS tries failed:

autodiscover/lib/autodiscover/pox_request.rb

Line 45 in e3bcbf6

yield redirected_http_url

The 302 Location header is used if present:

autodiscover/lib/autodiscover/pox_request.rb

Line 59 in e3bcbf6

(response.status == 302) ? response.headers["Location"] : nil

So there is no need to add the HTTP requests. They just were never executed before because of the unhandled exceptions.