Which of the following options is typically not included in a concurrent software license?

A concurrent software license is designed to allow a specified number of users to access the software simultaneously, but it does not generally grant unlimited installations across devices. While this type of license provides flexibility in terms of how the software can be used, it often comes with a cap on the number of concurrent users, which is outlined in the license agreement. The limitation is what distinguishes concurrent licensing from other types of licensing models.

Unlimited installations across devices would mean that users could install the software on as many devices as they wish, potentially exceeding the capacity implied by a concurrent model. Therefore, it's logical that this option is typically not included in a concurrent software license arrangement, as the license focus is on managing user access rather than the number of installations.

The other options, such as multiple users accessing the software simultaneously, a fixed number of concurrent users, and time-limited access, are facets that are consistent with the nature of concurrent licensing agreements.