Change Let's Encrypt to Commercial Certificates for two domains seperate

Change Let's Encrypt to Commercial Certificates for two domains seperate?

One Server Carbonio CE

Two Mail Domains

Two Virtual Host

Two Certificates form GlobalSign Alpha SSL Wildcard

I try in Web Admin Panel and then do zmproxyctl restart

But nothing work.

I still get Let's Encrypt.

I try to full zmcontrol restart and full reboot server.

And i still get Let's Encrypt.

Then i try delete Let's Encrypt from web, and restart proxy or reboot server.

And still i see Let's Encrypt but not commercial certificate on two domains.

How do this???????