2.11.1.4 PtypServerId Type

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
Ours								folder ID
...
...								message ID
...
...								Instance
...

Ours (1 byte): The value 0x01 indicates the remaining bytes conform to this structure; the value 0x00 indicates this is a client-defined value and has whatever size and structure the client has defined.

folder ID (8 bytes): A Folder ID structure, as specified in section 2.2.1.1.

message ID (8 bytes): A Message ID structure, as specified in section 2.2.1.2, identifying a message in a folder identified by an associated folder ID. If the object pointed to is a folder, the value of this field MUST be all zeros.

Instance (4 bytes): An unsigned instance number within an array of server IDs to compare against. This field is used only for searches against multivalue properties and MUST be zero in any other context.