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2.1.3.2.5 Importance

To generate an Importanceheader (2), a client sets the value of the PidTagImportance property ([MS-OXCMSG] section 2.2.1.11) as specified in the following table.

PidTagImportance property value

Importance header value

0x00000000

Low

0x00000001

Normal

0x00000002

High

MIME writers MUST map the value of the PidTagImportance property to the Importance header (2), as specified in the table. MIME writers MAY omit the Importance header (2) for a PidTagImportance value of 1 (normal) or for values other than 0, 1, or 2.

When generating a TNEF message, MIME writers also map the value of the PidTagImportance property to the attPriority attribute, as specified in [MS-OXTNEF] section 2.1.3.3.10, and the attMsgProps attribute, as specified in [MS-OXTNEF] section 2.1.3.3.21.

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