I have been a software developer in a large organization for more than 7 years. I have an ADHD problem and see a psychiatrist every 3 weeks. My manager is now demanding access to all my health records or saying he will fire me. He has also locked my Active Directory account (he says temporary) and deactivated my building pass until I sign the document for HR to obtain all my medical records.

I am located and based in Melbourne. My manager is asking me to sign the document “ Permission To Release Information” Should I sign the document so my employer has access to all my medical records and all the psychiatrist’s notes on me?
The employer demands access to all information in my medical records.