If you mean SSO in terms of login once to any system, then automatically login anywhere else then unfortunately it does not have this possibility at this moment.
If you are thinking about central authentication, like LDAP or Active Directory to utilize your domain account to login, then yes this is supported.
All topics and replies made is based on my personal opinion, viewpoint and experience, it does not represent the viewpoints of MicroFocus.
All replies is based on best effort, and can not be taken as official support replies.
I agree with Marius
At the moment you can utilize the following authentication mechanisms
There are several dependencies to keep in mind, e.g. the admin account would also require authentication through the external chosen authentication method.
Keep in mind that while thinking out the Architecture of said mechanism you take into account single point of failures as this may result in users being not able to log in, if there is no connection to the external access control system.