The following properties are reserved for use by MAPI 1.0:
PR_AB_DEFAULT_DIR
PR_AB_DEFAULT_PAB
PR_AB_PROVIDERS
PR_AB_SEARCH_PATH
PR_AB_SEARCH_PATH_UPDATE
PR_PREPROCESS
PR_RECIPIENT_STATUS
PR_RTF_SYNC_BODY_COUNT
PR_RTF_SYNC_BODY_CRC
PR_RTF_SYNC_BODY_TAG
PR_RTF_SYNC_PREFIX_COUNT
PR_RTF_SYNC_TRAILING_COUNT
PR_SERVICES
PR_STORE_PROVIDERS
PR_TRANSPORT_KEY
PR_TRANSPORT_PROVIDERS