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 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 that includes only the following elements from the Contact class:

This use of the Sync command is further specified in [MS-ASCMD] section