V15.5 Licenses - Purchase

[tinanelson]

Can you still buy 15.5 Licenses. We own several copies of Server 2012R2?
What about Version 14 licenses?

Via Vendors?

 

[CentrexJ]

No. The license servers for these version is retired. That said you can upgrade direct from v15.5 to v18 with a backup.
For customers on Server 2012 R2 setup a VM inside it and load the 3CX v18 debian ISO image.

 

[NicholasP_3CX]

Please ensure that Hyper-V version 6.2 and above is in use.

https://www.3cx.com/docs/manual/phone-system-installation-windows/
https://www.3cx.com/docs/manual/installing-debian-linux-pbx

Also note that these versions can no longer be activated, even if you do manage to find a license.