Raises the mode of operation for the forest.
Assembly: System.DirectoryServices (in System.DirectoryServices.dll)
A call to the underlying directory service resulted in an error.
The target server is either busy or unavailable.
Based on the current operating mode of the forest, the value specified for forestMode is not valid.
forestMode is not a valid ForestMode enumeration value.
The object has been disposed.
The specified account does not have permission to perform this operation.
The ForestMode value can be raised but not lowered. This means that raising the functionality level of the forest is not reversible and the decision to do this should be made carefully.
For more information about forest operational modes, see Domain and forest functionality.
The following table defines the valid values for forestMode based on the current operating mode of the forest.