hello..
The veeam support say the token is valid until 24 hours from sucessfull login, so if we connect less than 24 hours then no MFA needed.
From the case details, I understand that you have queries regarding MFA.
This is a known behavior in Veeam Backup & Replication v13 related to how MFA login sessions are handled for remote console connections.
When you first log in from your laptop and complete MFA successfully, Veeam creates a secure session token for that device. Because of this, future logins may use the existing token and may not ask for MFA again until the token expires.
This is why MFA was requested the first time on your laptop, but not every time afterward. Rebooting the laptop does not clear this token, since it is stored by the Veeam Console application.
The token can remain valid for up to 24 hours from the last successful login