Update to V16 from V15.5 SP1

[leobianchi]

What is the right process to follow in this case? How do I update from V15.5 SP1 in windows?

 

[Saqqara]

Upgrade to 15.5 sp6 https://www.3cx.com/blog/news/pbx-upgrade-update-6/ as I am not sure you can upgrade from your current version

Backup current system, move backup from 3cx folders

Uninstall 3cx

Reboot server

Install v16 using the backup

 

[leobianchi]

I cannot jump straight to V16? Is it necessary to activate in V15.5 SP6 first?

 

[CentrexJ]

You should upgrade to v15.5 SP6 first using the instructions linked below and then do the backup, uninstall, re-install, restore backup procedure above that Saqqara mentioned.

Make sure your 3CX license maintenance is current first.

https://www.3cx.com/blog/news/pbx-upgrade-update-6/