Allow one account to have multiple sessions
To enable a group of users use a shared account on multiple stations at the same time, configure the MultiPoint server to allow one account to be logged on to multiple stations simultaneously. By default, if a user logs on to a second station with a shared user account, the user account is logged off the first station.
From the Start screen, open MultiPoint Manager.
Click the Home tab.
In the Computer column, click the name of the MultiPoint Server computer, and then, in the right pane, click Edit server settings.
Select the Allow one account to have multiple sessions check box, and then click OK.