Brother HL 4570CDWT - Manual (Page 75)

Security features
70
7
Import and export a CA certificate
7
You can store a CA certificate and private key on the machine by importing and exporting.
How to import a CA certificate and private key
7
a
Click Configure CA Certificate on the Configure Certificate page.
b
Click Import CA Certificate. Click Submit.
How to export a CA certificate and private key
7
a Click Configure CA Certificate on the Configure Certificate page.
b Choose the certificate you want to export and click Export. Click Submit.