license server appears to be reallocating licenses incorrectly

We have 50 licenses to NCrunch served from the NCrunch License server.
We recently upgraded to the latest license, and have NCrunch v3.3.0.6 installed on the developer's machines.

I have had several developers complain that they are getting a regular popup, every 10-15 minutes in once case, saying

The license you have been using has been reallocated to a different machine on the network.

When I asked the license administrator about it the other day, we were actually using less than half of the licenses.

Looking for some ideas on what might be causing this.

Hi, thanks for sharing this issue.

The license server relies on the concept of a unique id (see http://www.ncrunch.net/documentation/tools_license-server_my-unique-id), which identifies each user accessing the server.

If two different people are using the same unique id, they will be allocated the same physical license key on the server and the allocation will switch between them, giving the behaviour you've described.

Note that if your users aren't specifying a unique id in their license details, their system will default this to their system login name. This means that the problem could actually be related to the configuration of your network if you have multiple machines with the same login name.

A good way to manage licenses is to make sure everyone sets their unique id to their company email address. In this way, there will be no license conflicts, and the license administrator can easily identify them on the list of allocations. It's possible to specify a unique id when you enter the license server address into the NCrunch VS plugin/client.