CMS can run in two operational states:

• Multi-user mode: Any defined user can log on to CMS.

• Single-user mode: Only one user can be logged in to the CMS server at a time.

You must enable single-user mode when making changes to the following systems and procedures:

• Master ACD changes

• ACD group administration

• Data storage allocation

• Storage intervals

• Restore specific types of data

• Migrate specific types of data

The CMS State page can be used to select which ACD serves as the master for time synchronization.