Since migrating mailboxes from Exchange 2007 to 2010, we have been unable to send to mail-enabled public folders. Initially, newly created public folders (created since the migration) were also generating this error, but after resolving some other active directory related errors I am now able to send mail to the new folders, but getting a different error on the old mail-enabled PFs.
The initial error being generated when sending to all mail-enabled PFs was "#554 5.6.0 STOREDRV.Deliver.Exception:ObjectNotFoundException; Failed to process message due to a permanent exception with message The Active Directory user wasn't found", which was resolved by removing the empty 'Servers' container from the 2003 First Administrative Group. There was also some certificate errors which have been resolved.
The full error now being generated when sending to the migrated PFs is:
#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: "MapiExceptionNotFound:16.18969:BA000000, 17.27161:0000000054000000000000000000000000000000, 255.23226:00000000, 255.27962:44000000, 255.17082:BFF9FFFF, 0.25697:00000000, 4.21921:BFF9FFFF, 255.27962:FA000000, 255.1494:00000000, 255.26426:96000000, 4.18236:BFF9FFFF, 4.7974:BFF9FFFF, 255.1750:13800000, 0.26849:00000000, 255.21817:BFF9FFFF". ##
I've found a few people reporting this on the net, but the only workaround suggested is to export the data, recreate the hierarchy and re-import, which is not ideal.
Does anyone have any other suggestions on resolving this?