Unable to use a shared mailbox

Summary

Attempting to configure mail in a shared mailbox setting fails with an authentication error.

Steps to Reproduce

This was reproduced with Office365, however will also occur on other mail servers.

1. Setup a shared Office365 mailbox.
2. Attempt to setup an Email Channel using JIRA Service Desk with the below configuration:
   • username: <O365 user name>/<shared mailbox name>
   • password: <O365 user password>

Expected Results

JIRA Service Desk is able to connect to the mailbox.

Actual Results

The below error is presented in the logs and the authentication fails:

2015-02-26 20:35:20,904 http-bio-8080-exec-2 ERROR captain.planet 1235x15715x1 j7sdem 192.168.16.91 /rest/servicedesk/1/servicedesk/PEWPEW/incomingemail/validateemailforcreation [servicedesk.squalor.email.MailServerVerifier] Unable to connect to the server at outlook.office365.com due to the following exception: Unfortunately JIRA Service Desk couldn't connect to the mail server. Here is what the mail server said: "AUTHENTICATE failed."

Additionally the below error can occur during configuration: