A new user had to register both for Bitbucket and Atlassian in order to get SourceTree for Windows working. I was under the impression the two are supposed to be the same?
Details:
I invited a user to our Bitbucket repo. The user registered and succesfully got access to our repo.
The user then installed SourceTree, but could not "Clone to SourceTree" from Bitbucket.
When asked to register SourceTree the newly created Bitbucket account did not work, instead the user had to create an Atlassian account as well.