126.96.36.199 Refreshing the Recipient Information Cache
Retrieval of a minimal set of Contact class data that represents the recipient information cache is initiated by the client, as specified in section 188.8.131.52. The recipient information cache is not supported by protocol versions 2.5, 12.0, and 12.1. The server responds with a Sync command response ([MS-ASCMD] section 184.108.40.206) that includes only the following elements from the Contact class:
Email1Address (section 220.127.116.11)
FileAs (section 18.104.22.168)
Alias (section 22.214.171.124)
WeightedRank (section 126.96.36.199)
This use of the Sync command is further specified in [MS-ASCMD] section 188.8.131.52.5.