Platform SDK: MAPI

Microsoft Mail for PC Networks (MS)

The custom recipient address is in the following format:

[MS:Network/PostOffice/UserID]

Network
A 10 char (max) name of a MICROSOFT Mail Network.
PostOffice
A 10 character (max) Postoffice name.
UserID
A 10 chararacter (max) name of a PC Mail user.
/
A delimiter.

This address type is also used at times by Microsoft Exchange Server.