Many users from your agencies share the same e-mail account for multiple logins for several airlines (mostly in places where there is more than one airline in the region using AeroCRS)
As a request from airlines and agencies and in order to ease the process of moving between systems (instead of logging out and in again), we are implementing a feature which will allow the user to move between accounts fast and reliably.
The move between users would be in case the same user have the same e-mail address defined in the account across airlines.
In preparation to this deployment, we kindly ask you to verify that each user have a unique e-mail address (even non-agency users - system users), so users will not see other user accounts.
If you would like them not to be able to do so, you can just add +1 for the other e-mail, so user can have "firstname.lastname@example.org" and another user can have "email@example.com" (e-mail systems ignore the +X).
The deployment is scheduled for the 1/JAN/2018 (update from 01/SEP to allow sys admins to prepare), allowing you sufficient time to prepare for such a change.
If you have any questions on this development, please consult AeroCRS Support.