Hello, someone please help. I can't link to my Microsoft account through the Playstation Minecraft client.  My Microsoft account has never been linked to Playstation, and yet when trying to link my playstation acct to my microsoft account via Minecraft it says it's already linked to a different playstation account. Which is impossible as I only have the one playstation account.

Microsoft account linked apps details doesn't show any links to playstation.  Playstation linked apps doesn't show any links to Microsoft.  Mojang support says to try XBOX support, XBOX support says to try Playstation support, and Playstation support says to contact Microsoft. 

Googling around shows this has been a problem for quite a while, and there has apparently been patches that claim to fix it but it seems to still be an issue. 

For reference, I have family accounts on both playstation and microsoft.  Maybe what Hector said in the comments of this thread is correct, and in the backend it's trying to link all signed in playstation accounts to all microsoft family accounts, and somewhere in the pipeline it craps out and both become unusable.

Here is a comment from MCPE-96635 that I'm referencing:

 
Warmuffin0341 added a comment  19/Jun/21 9:43 PM  edited
I believe this issue can also be exaggerated by having a family account on Microsoft. Rather than linking to 1 Microsoft Account email, Minecraft on PSN is attempting to link to BOTH emails associated with the MS family account for Minecraft. 

Example: Parent email: Parent1(at)outlook.com creates Microsoft account for child: Child1(at)outlook.com under the Microsoft Family Account portal. 

This then links the accounts with the Parent being the "organizer" and the child as "member" however, the accounts are tethered. So attempting to link them to something as PSN registers as 2 emails, rather than just 1 unique one. 

Creating a new email seems to work (sometimes) so this might help isolate 1 instance of the bug. However, I recognize this doesn't apply for everyone.