Besides the recommended instructions (Replace your Certificate), there is another way to replace your certificate. For this, you do not need a .pfx file, only the .key and .crt files. 

Step-by-Step Guide(Applies to Company Certificates)

1. Navigate to the installation path of the backend, copy the path and paste it into the file explorer.
   
   C:\ProgramData\empower\backend\empower\root\Services\traefik
   -->empower backend >=8.6
   C:\ProgramData\Made in Office\empower backend\empower\root\Services\traefik 
   --> empower backend <8.6
   
   
2. save the empower.crt and empower.key file
   
   
3. Change the name of the new certificate and key to empower.crt and empower.key (as in the picture shown) and add it to the traefik folder