HKEY_LOCAL_MACHINE\Software\Cyco\AutoManager Meridian\CurrentVersion\Server\UserDatabase

Registry values
Value Name	Data Type	Value Data
ConnectionString	String	Path to the Meridian user and group database file. For example, C:\BC-Meridian Vaults\ICUserDB.sdf. Note: By default, Meridian Enterprise Administrator relies on SQL Server Compact Edition being installed on 64-bit computers to store the user accounts database. If it is not installed or the ConnectionString registry setting is not set correctly, the Meridian Administrator window will be empty and unresponsive when it is launched. To resolve this, either install SQL Server Compact Edition or set this value correctly. We do not recommend storing the user and group database in a different edition of SQL Server.
UserDBSqlCeProvider	String	The version of Microsoft SQL Server Compact Edition to use for the user database. The default is Microsoft.SQLSERVER.CE.OLEDB.3.5. To use Microsoft SQL Server Compact Edition 4.0, set to Microsoft.SQLSERVER.CE.OLEDB.4.0.
UserNameFormat	DWORD	Format for the display of user names. If this registry value is missing or empty, the to-do list name only is shown. The user information shown is always that of the primary Windows account associated with the Meridian user account. The possible values and their corresponding formats include: 0 – To-do list name (Display Name) 1 – Display Name 2 – Display Name (email@address) 3 – Display Name (Domain\User) Note: Changing this value requires that the EDM Server service be restarted to take effect.