IDA Teams uses a subscription-based licensing model, allowing users to pay an annual fee per seat. It uses a server that keeps track of all work done by the team.
After your purchase of IDA Teams licenses, you will receive an e-mail that contains a link to a download area, where you will find, among other things:
an installer for the IDA Teams server (also called the "Hex-Rays Vault server")
an administration guide for the IDA Teams server
Please follow the instructions in the administration guide to install the server.
IDA Teams can be used either online (i.e., with a connection to its server), or offline (e.g., if you have to travel.)
To enable this mechanism, it is possible to "borrow" a license for a certain amount of time, through IDA's "Help" menu.