The DSROLE_OPERATION_STATE enumeration specifies values that determine whether a DC promotion or demotion operation is currently being performed on a computer.<4>

 typedef  enum _DSROLE_OPERATION_STATE
 {
   DsRoleOperationIdle = 0,
   DsRoleOperationActive,
   DsRoleOperationNeedReboot
 } DSROLE_OPERATION_STATE;

DsRoleOperationIdle:  No promotion or demotion operation is currently being performed on the computer.

DsRoleOperationActive:  A promotion or demotion operation is in progress.

DsRoleOperationNeedReboot:  A promotion or demotion operation has been performed. The computer MUST be restarted to function in the new role.