DirectoryEntry eLocation = new DirectoryEntry("LDAP://CN=Test User,OU=Users,OU=Development,DC=domain,DC=com");
DirectoryEntry nLocation = new DirectoryEntry("LDAP://OU=Users,OU=QC,DC=domain,DC=com");
eLocation.MoveTo(nLocation);

A referral was returned from the server.
Error code: -2147016661
Extended Error Message 0000202B: RefErr: DSID-0310082F, data 0, 1 access points
ref 1: 'domain.com'

DirectoryEntry eLocation = new DirectoryEntry("LDAP://CN=Test User,OU=Users,OU=Development,DC=domain,DC=com", "domainadmin", "password");
DirectoryEntry nLocation = new DirectoryEntry("LDAP://OU=Users,OU=QC,DC=domain,DC=com", "domainadmin", "password");
eLocation.MoveTo(nLocation);
nLocation.Close();
eLocation.Close();