The Reference ID (or Key in older versions) is generated by IceWarp Server and is unique for the machine you install IceWarp on. You may need to find this key if you migrate IceWarp to a new server or if you need to retrieve your License.

On IceWarp Windows Installation

You can find your unique Reference ID in the IceWarp Configuration Console when you click Help > Licenses.

The Reference ID is the number you are looking for.

Another option is to check web administration console (webadmin). Enter your administration URL into browser http://<domain:port>/admin and log in with an account that has administrator rights.

In the tree on left side, click License. The Reference ID is the number you are looking for.

On IceWarp Linux Installation

You essentially have the same options as an administrator on Windows, but you can also use the Wizard to get the Reference ID.

You can find your unique Reference ID in the IceWarp Remote config when you click Help > License (see screenshot from console above).

You can also use web administration. Enter your administration URL into browser http://<domain:port>/admin/ and log in with an account that has administrator rights. In the tree on left side click on license, the Reference ID is the number you are looking for.

Navigate to IceWarp installation folder (by default /opt/icewarp/) and run ./wizard.sh, press Enter and select Licence operations by pressing the number next to it. In License Operations select Display reference key.