When you try to send a meeting request from Outlook you get the following error :

Your message did not reach some or all of the intended recipients.




      Subject:    Test Message


      Sent: 29/03/2012 13:51




The following recipient(s) cannot be reached:




      Smith John (Test) on 29/03/2012 13:51


            This message could not be sent. Try sending the message again later, or contact your network administrator.  Error is [0x80070057-00000000-00000000].


To fix this you need to ensure that the sender of the request has picked the address from the global address book or if that does not resolve the issue try a /cleanprofile or /cleanfreebusy and this should resolve the issue.  I have seen this error on Outlook 2003 and 2007 so it may be on other version also. 

By Duncan

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