Have a mail enabled public folder with a specific eform. When a user sends the form its goes to the public folder but the "cc" users on the form do not recieve the message and the sending user gets a bounce back stating; There's a problem with the recipient's mailbox. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message, or provide the following diagnostic text to your system administrator. #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: "MapiExceptionUnexpectedType:..., 255.27962:4D000000, 255.27962:86000000, 255.27962:86000000, 255.27962:9C000000, 255.17082:04030480, 0.23137:44130000, 4.21921:04030480, 255.27962:FA000000, 255.1494:00000000, 255.1238:00000000, 0.16668:0F010480, 0.27420:0F010480, 0.39497:EC030000, 4.55881:0F010480, 0.27676:0F010480, 0.23580:EC030000, 0.36537:0F010480, 4.5587:0F010480, 0.65193:0F010480, 6.21970:0F0104800300EF6704030480, 6.21970:0F0104800201F36704030480, 6.21970:0F0104800300EF67E7FAFFFF, 6.21970:0F0104800201F3670F010480, 6.21970:0F0104800300EF670F010480, 6.21970:0F0104800201F3670F010480, 6.21970:0F0104800300EF670F010480, 6.21970:0F0104800201F3670F010480, 6.21970:0F0104800300EF670F010480, 6.21970:0F0104800201F3670F010480, 1.17350:03004E0E, 4.2081:04030480, 255.1750:00000000, 0.26849:00000000, 255.21817:04030480, 0.32758:0F010480, 4.16586:04030480, 0.22518:00000000, 4.28874:04030480, 0.17654:00000000, 4.18122:04030480, 0.25510:10000000, 4.25270:04030480, 0.25529:6C770000, 4.30026:04030480, 16.18969:34000000, 17.27161:000000002E000000000000000000000000000000, 255.23226:00000000, 255.31418:61170000, 0.24569:02000000, 0.19921:06000000, 4.26617:04030480". ## I have tried googleing the error with no help. I am sure its the form as it doesnt matter what mailboxes I add to the list the same bounce backs are received. Other forms are working great as well. Please help!

Hi If this is critical for you I'll suggest you to call PSS and raise a case http://support.microsoft.com/Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Hi, Since the problem is in this specific form, why do not you try to re-design a new form? Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT

What bothers me is I am not seeing the error in the app log on the server. This form has been in use for close to a year, and all of a sudden it stops working. I will see if the form can be recreated, but would love to know why this started and so far i can not find any advice on the error, seems the "MapiExceptionUnexpectedType" error has not been seen before...?

Also this happened shortly after this months patch cycle. Is it possible that there was a MAPI change that doesnt like forms going to user mailboxes as opposed to public folders?

Update this is actually happening to all forms, I took a working form and added my user address as a CC and sure enough i receive the same bounce back.

And one more update, just recieved word that a few of our users are receiving the same bounce backs just sending a normal email. Not happening to everyone but can be replicated. Going to bounce the server tonight and start rolling the latest set of patches off see if it corrects the issue. Anyone have any other ideas? If tonight doesnt resolve the issue i will be opening up a case with MS

Reboot corrected the issue, have to love self healing software.