2.2.3.2 Exchange Distinguished Name

The legacyExchangeDN attribute represents a distinguished name (DN) of the entry. This DN MUST be formatted as specified in [MS-OXOABK] section 2.2.1.1. This value MAY<4> be used as a proxy address for an entry, with the following format.

 proxyAddressFromExchangeDN ::= "EX:" <Exchange DN>
 <Exchange DN> ::= ; The value of the LDAP attribute legacyExchangeDN