This answer applies to IDEA StatiCa version 21.1.6 and newer
To check the current usage of your company license, log in to the IDEA StatiCa User portal and go to the License section.
In the "Products" part, you can see an overview of the usage and the total number of seats for each product. When you click on the current product status, you will see a pop-up table with the names of users who are currently using the product.
If your activations are used up, ask some of your colleagues to release their license activation.