How can MFCMAPI be used to look up if the Free/Busy message exists on the server and is accessible?
To use the MFCMAPI tool from MicroSoft (it comes with excellent documentation ('MFCMAPI.doc')) on how to find the Free/Busy messages:
1. Log on as an account that has Exchange Full Administrative permissions.
2. Start MFCMAPI on target Exchange server by double-clicking the executable.
3. On the Session menu, click Logon and Display Store Table.
Note: If the Choose Profile dialog box does not appear, you are probably already logged on to a profile. Quit and log off the client and profile, and try step 3 again. Or create a new profile for the service account by pressing "New"
4. Select the profile that you created for the FB sync (service account), and then click OK.
5. On the MDB menu, click Open Public Folder Store, select Use Admin Privileges, and then click OK.
6. In the Public Folders window, expand Public Root, and then expand NON_IPM_SUBTREE. The SCHEDULE+ FREE BUSY folder is displayed.
7. Expand the SCHEDULE+ FREE BUSY folder.
The subfolders of the Schedule + Free/Busy folder will be of the form EX:/o=Organization/ou=domain.
You can double-click the appropriate folder to open it.
Note: The folder could have several messages in it. Make sure if you have a set of mailboxes that are not syncing look under the Subject column and you should see their CN name if not that is the reason Free Busy is not syncing. Example: USER-/CN=RECIIPENTS/CN=USERNAME