Upgrading 3CX Debian 8 to Debian 9 Stretch

[Elliot Cater]

Hi

Are there any instructions for upgrading the Debian installation of V15 (v8) to V15.5 (v9) without uninstalling and re-installing.

Cheers

Elliot

 

[eddv123]

Here you go:
https://www.3cx.com/blog/docs/upgrading-debian/

I would recommend you take a backup and store off of the server before attempting such things.