We’ve recently been in a situation on a sandbox tenant where we as admins were locked out of the UI due to multiple accounts having the same uid/name attribute from another source. (other than the IDN Admin Source)
When opening a support ticket we were asked to enable the Support connection, however it seems like this option is only available in the UI.
Having an API to open the Support connection will allow us to get quicker support in cases where we are locked out of the UI.