This article applies if you are getting the following error:
This error is usually related to a reverse proxy server (e.g. nginx), which is used to handle all incoming requests to JIRA. If you are not familiar with these terms, please forward this article to your IT adminstrator or the person in charge of JIRA.
When following the official tutorial, the important "Authorization" header seems to be missing from the requests to JIRA. Therefore, it's not possible for us (Outlook) to authenticate against JIRA and to log in with your credentials. To fix this, it'll be necessary to pass the "Authorization" header. This can be achieved by configuring your NGINX location block with the following parameters:
proxy_set_header Authorization $http_authorization; proxy_pass_header Authorization;
This will forward the header correctly. Please contact us, if this does not solve the problem for you!