3.3.4.4.2.4 GetADPrincipalGroupMembershipRequest/PrincipalDN

The PrincipalDN element contains the DN of the directory object representing the principal whose group memberships should be returned.

 <xs:element minOccurs="0" name="PrincipalDN" nillable="true" type="xs:string" />

The PrincipalDN element refers to a directory object that is a security principal ([MS-ADTS] section 5.1.1.5).