Features that are specific to Microsoft Exchange Server information stores are accessed as properties and interfaces, and are defined in EDKMDB.H. Most properties on message store objects are read-only.
The information store properties declared by Microsoft Exchange Server in the EDKMDB.H file are listed in the following table. This table also indicates whether a function call to retrieve the value of a given property causes an RPC. For more information, see Reducing the Number of RPCs.
Microsoft Exchange Server Information Store Properties
| Property Designation | Access | Causes RPC? |
|---|---|---|
| PR_EFORMS_REGISTRY_ENTRYID | Read-only | No |
| PR_FREE_BUSY_FOR_LOCAL_SITE_ENTRYID | Read-only | No |
| PR_GW_MTSIN_ENTRYID | Read-only | No |
| PR_GW_MTSOUT_ENTRYID | Read-only | No |
| PR_IPM_DAF_ENTRYID | Read-only | No |
| PR_MAILBOX_OWNER_ENTRYID | Read-only | Yes |
| PR_MAILBOX_OWNER_NAME | Read-only | Yes |
| PR_NON_IPM_SUBTREE_ENTRYID | Read-only | No |
| PR_OFFLINE_MESSAGE_ENTRYID | Read-only | No |
| PR_OOF_STATE | Read/write | Yes |
| PR_SCHEDULE_FOLDER_ENTRYID | Read-only | No |
| PR_SPLUS_FREE_BUSY_ENTRYID | Read-only | No |
| PR_TRANSFER_ENABLED | Read/write | Yes |
| PR_USER_ENTRYID | Read-only | Yes |
| PR_USER_NAME | Read-only | Yes |