License seats will auto-transfer between machines for all machines logged into Toolbag with the same Marmoset account. There is no limit per account on how many license seat transfers may occur. However, transfers are limited by a short cooldown period.
Each time the software is used, a license from that account is locked to the machine with a 30-minute cooldown period, and is eligible to be reallocated to another machine once its cooldown period has lapsed. All license cooldown periods for your licenses can be monitored through the licensing account portal.