Installing Trusted Cert via Provisioning

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This is for 3CX V15 SP2

Has Anyone been able to find a way to install a trusted cert through the provisioning template on the Yealink T2x/T4x phones? I am using Secure SIP and would hate to have to manually install it on every phone. I have a 360 extension install coming up.

I have added the cert to the provisioning folder and added the http link to the template but it does not load the cert.
I have to manually load it after the handset has provisioned.

#######################################################################################
## Certificates ##
#######################################################################################
#Before using this parameter, you should store the desired certificate to the provisioning server.
trusted_certificates.url = http://FQDN:5000/provisioning/xxxxxxxxx ... XPHONE.pem

#trusted_certificates.delete = http://localhost/all,delete all the trusted certificates.
trusted_certificates.delete =

#Before using this parameter, you should store the desired certificate to the provisioning server.
server_certificates.url =

#server_certificates.delete = http://localhost/all, delete the server certificate.
server_certificates.delete =

#######################################################################################

If i paste the link into a web browser the cert downloads.

http://FQDN:5000/provisioning/xxxxxxxxx ... XPHONE.pem

 

[Deepest]

Am i the only person utilising SIP-TLS ? Or does every one install the cert manually ?