Hi All,I am gettting following errorfrom exchange 2007when forwarding the meeting request to user. Diagnostic information for administrators: Generating server: acplmum-ho-huca.avendus.com IMCEAEX-_O=AVENDUSEXCH_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FYDIBOHF23SPDLT+29_CN=RECIPIENTS_CN=MAHESH+2EKHANOLKAR@avendus.com#550 5.6.0 STOREDRV.Submit; message is treated as poison. ## Original message headers: Received: from ACPLMUM-HO-MB01.avendus.com ([192.168.136.11]) byacplmum-ho-huca.avendus.com ([192.168.136.10]) with mapi; Fri, 11 Dec 200915:01:29 +0530MIME-Version: 1.0Content-Type: text/plainDate: Fri, 11 Dec 2009 15:01:29 +0530Message-ID:<F33838141243124D9299C9AC3FD6D79001BAD9F47C@ACPLMUM-HO-MB01.avendus.com>Subject: FW: Test MeetingWe have MS Excahnge 2007 SP1 ON CCR CLUSTER and HUBCAS on diffrent server. Also we have Blackberry Enterprise Server 4.1.7.The user which facing this issue is Blackberr Server User As Well The isssue is When user A Creating meeting request and Sent to User B as its works fine But When user B forwarding the same meeting request to User C which is not a part of the meeting the organiser gets following the mentioned error.Thanks Mahesh

Check the event IDs as you are getting poison messages. Poisons messages are When a message causes a crash, the value of the PoisonCount property on the message is incremented. When a messages PoisonCount value reaches the PoisonThreshold associated with the TransportServer settings, that message is removed and placed in the Posion Message Queue. By default, the PoisonThreshold for the Transport Service is set to 2. This threshold can be changed using the Exchange Management Shell.check if some thing really crashing on the server.Raj

Also Please check "EmailAddressPolicyEnabled" if it is set as "True" on mailbox object. If not enabled, Please enable it. Get-mailbox -id <User ID in Question> | fl Emailaddresspolicyenabled Get-mailbox -id <User ID in Question> | Set-mailbox -emailaddresspolicyenabled:$True Hope this helps. Thanks. Vishal Ramnani MCITP - Exchange 2007, MCSE Messaging, MCTS - Win 2008 Config

Hi Raj Thanks for advice. This issue is happen only with Blackberry Users. We tested with only exchange mailbox users its works fine. Also the meeting request owner received alert when the invite forward the message to other user. How can i find out actual reason Thanks Mahesh

Hi Vishal, The email address policy in true sate and alsoapplied. Thanks Mahesh

So what you are saying is from OL , you can forward the meeting requests fine. Its only BB , from where you are having the issue.Check this out http://support.microsoft.com/default.aspx/kb/899704also can you put this on BB forums and see if get some heads up from there.http://supportforums.blackberry.com/t5/BlackBerry-Professional-Software/Strange-Meeting-Request-Issue/td-p/252849;jsessionid=6F562A60A90FE498702C7B2F684E09F4http://www.blackberryforums.com/general-blackberry-discussion/91858-outlook-meeting-requests-via-bis.htmlRaj

Hi Raj Someclarityon the issue. Theissuewe are facing when forwarding meeting request form OUTLOOK 2007. In our scenario 90% users on blackberry Enterprise serve. Very few users using only exchange mailbox. When meeting request forward to another user from outlook 2007 The owner of the meeting request getting bounce message. When we tried with only exchange user through outlook its works fine. Also this issue came after we upgraded BES SP7. We log the case with bes as well, but bes Support teamrevertwith the problem not with there server end BES server log shows message transfer to exchange server. Please advice Thanks Mahesh

As you said it all started with an upgrade of BES. Can you take it one version old and see of that starts working correctly?Raj