Test Connection from Sharepoint to Confluence works, but the
Test Connection from Confluence to Sharepoint gives the following error:
This is a known bug for versions of Sharepoint Connector earlier than 1.2 - CSI-547.
When using Basic Authentication, the username entered in Sharepoint admin panel in Confluence must be "email@example.com" format, rather than "DOMAIN\User" format. If the name is in "DOMAIN\User" format, the "DOMAIN" portion will be stripped when it reaches Sharepoint, causing the authentication to fail.
Fixed in a newer version