In the admin mode, the following additional option, which is used to configure the settings for the iManage Work accounts that you want to connect to, is available on the iManage Drive Accounts page (Access iManage Drive settings  icon > Account Settings):

Server Authentication Settings: The iManage Work accounts that are added to iManage Drive may require you to reenter your user name and password when the authentication token expires. If you don't want to be prompted to authenticate, clear the Prompt for Authentication check box that's selected by default.