How do I transfer ownership of the superuser/domain administrator?

[AndrewPaloAlto]

Hi all, 
So, the user that has superuser/domain administrator access to our support.paloaltonetworks.com is no longer at our company, and we need to transfer super user/domain administrator ownership to a different user in our support.paloaltonetworks.com accounts.  
It seems like only the superuser has the ability to transfer ownership, how do we change ownership if that user is now gone?  

[BPry]

@AndrewPaloAlto,

Create an alias for the old superuser's email account to an account that is active on your email platform and regain access to the existing superuser account is the fastest path forward. As long as you can access email you can reset MFA and then simply elevate one of your other accounts to superuser.

If that isn't an option for some reason, then just open up an admin case and explain the situation. This process has been different for almost everyone that I've talked to, and it generally is faster to just do the above process.