Verifies that a previously established outbound trust with the specified forest is valid.
Assembly: System.DirectoryServices (in System.DirectoryServices.dll)
There is no outbound trust relationship with the forest that is specified by targetForestName.
A call to the underlying directory service resulted in an error.
The target server is either busy or unavailable.
targetForestName is an empty string.
targetForestName is null.
The object has been disposed.
The specified account does not have permission to perform this operation.