Session timeout and Inactivity timeout In Dynamics 365
By default, Dynamics 365 sets a user session timeout of 24 hours. A user is not required to log in with their credentials for up to 24 hours regardless of whether the user was active or inactive.
You can change this behaviour by Configuring session timeout in Settings –
Under Set session timeout section set the desired value for timeout in minutes.
Dynamics 365 does not enforce an inactivity session timeout. A user can remain logged in the application until the session timeout expires.
You can change this behavior by Configuring Inactivity timeout in Settings-
Under Set inactivity timeout section set the desired value for timeout in minutes.