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2.4.3 Message Store

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At the PST level, the message store is the root of the PST, which is the rough equivalent of the top of a Mailbox. The message store contains the top-level PST settings and metadata that are required to access and manage the PST contents.

At the LTP Level, the message store is implemented as a regular PC. At the NDB Layer, the message store is identified with a special internal NID value of NID_MESSAGE_STORE (0x21) (see section 2.4.1). Any valid PST MUST have exactly one message store node.