There are a number of ways that you can add a license key to an installed instance of the Windows Servers Enterprise Edition version of Kaspersky AV. You can create a group task in the admin kit that can be scheduled to run on a group. However I found this unreliable and preferred instead, as this was a one off occurrence (in this case a test server that our Enterprise license didn’t cover) that it is easier to use the Kavshell command instead.
Copy the license key to a location on the local server. In my case on the root of C:’
Open a command prompt on the server and change to the directory that has the kavshell.exe file
In the example it is:
C:’Program Files (x86)’Kaspersky Lab’Kaspersky Anti-Virus 6.0 For Windows Servers Enterprise Edition

To add your key type the following and change C:/License.key to the name and location of your license key:
KAVSHELL LICENSE /ADD:C:/License.key

The key is then added and should state that it was added successfully

Finally for the licence to be recognised you will need to restart the Kaspersky Anti-Virus service. As a result the tray icon should change from grey to active.
Further Kavshell commands
To check the license key status type:
KAVSHELL LICENSE

Additional commands are:
/ADD – installs the key from a file with a name given by the /ADD value.
/R – is an additional value to /ADD which allows a key to be added with reserve status
/DEL <serial number> – deletes keys with the serial number, given by the /DEL value.
