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PidLidDistributionListChecksum Canonical Property
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Specifies the 32-bit cyclic redundancy check (CRC-32) polynomial checksum for a personal distribution list.
Long ID (LID):
The value of this property can be used to detect when the dispidDLMembers (PidLidDistributionListMembers) property was updated without updating the other personal distribution list member properties by computing the CRC-32 on the existing value of dispidDLMembers and comparing it with the value of the dispidDLChecksum property.