Change/Update Zimbra Talk SSL Certificate on talk backend server

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Description

You will have to replace the certificate and the key file. They are located in

/etc/zimbra-talk/
and named:
SSL-Certifiate: ztalk-ssl-cert.pem<br>
PrivateKey: ztalk-ssl-cert.key

After you replaced these files by the new cert.- and key-files, please make sure you have set the proper access rights

sudo chmod 644 /etc/zimbra-talk/ztalk-ssl-cert.*

and restart talk-servers nginx component.

sudo service nginx restart

In case after nginx restart you still got issues, restart the whole server to get sure, every service is restarted properly!

Reasons
SSL-certificate on talk backend server needs to be replaced