By default, FDO User Manager is located in \Program Files\AutoCAD Map 3D\FDO\bin\. To start it, either double-click FdoUserManager.exe in Windows Explorer or enter FdoUserManager at a command prompt. (To invoke FdoUserManager from any prompt, add its directory to your path.)
New users you create with this utility automatically have the roles and privileges required by the AutoCAD Map 3D FDO functionality. However, FDO User Manager allows you to grant some additional privileges. Use commas to separate the role names, with no spaces. You can enter ? to see a list of roles. To verify the roles after you add them, select List All Roles And Privileges Of A User.