Did you ever bumped into this Non Delivery Report ?
#550 5.2.0 STOREDRV.Deliver: The Microsoft Exchange Information Store service reported an error. The following information should help identify the cause of this error: "MapiExceptionNotAuthorize
This is mainly caused by the wrong permissions of either Anonymous (for external sent mail) or Default (for internal sent mail).
External senders will receive the error if the Public Folder does not permit “Anonymous” to create new items.
[PS] C:\>Get-PublicFolderClientPermission \test
Identity User AccessRights
-------- ---- ------------
\test Default {FolderVisible}
\test mycompany.local/Users/A... {Owner}
\test Anonymous {None}
To grant this access run the following command in the Exchange Management Shell.
[PS] C:\>Add-PublicFolderClientPermission \test -User Anonymous -AccessRights CreateItems
Identity User AccessRights
-------- ---- ------------
\test Anonymous {CreateItems}
Internal senders are able to be authenticated by the Exchange server, and so are not treated as Anonymous. For internal senders the user must have at least Create Items permissions on the Public Folder. For general use Public Folders this can be granted as the “Default” permission.
To grant this access run the following command in the Exchange Management Shell.
[PS] C:\>Add-PublicFolderClientPermission \test -user Default -AccessRights CreateItems
Identity User AccessRights
-------- ---- ------------
\test Default {Contributor}
Now to see the name of the public folder (in this example is test) you can go in the public folder console in found in tools under exchange management console. Expand the default public folder and see their names.


