Public Sign-up and SSO problem

[MariosTest]

We are using Confluence, Jira, BitBucket & Bamboo.

We are also using Crowd for central aunthentication and SSO. 

Now, we would like to enable public sign-up.

But, as we can understand the users created via the public sign-up are in the internal directory of the tool.  Thus, they cannot access the tool at all because we are using the central crowd directory.

How can we directly create users to crowd server?  Or automatically transfer them>

We followed this tutorial as well with no luck:

https://confluence.atlassian.com/crowd/public-signup-setup-91554138.html?_ga=2.138187892.511573509.1562845184-603979077.1554970410