FIM IM offers a nice add-on to outlook, so user can request to join to a group, and the manager of the group can reply to this request by pressing a button on outlook message. Appon apporoval, the user will I want to add a digital signiture to the outlook add-on approval messages, so that the manager of a group can sign his/her reply. That signature will be processed and check for authenticity before actually join the requester to the group. My question is: 1. Is there any API/SDK to the outlook add-on so I can sign the message with the manager digital signiture? 2. If the answer is yes... where can I put the code for the authenticity check of the signiture before applying the joining of user to the group. BR, Tamir.Tamir Lavi

There is no API that has been published. However, the reason for requiring Exchange 2007 or later and Outlook 2007 or later is that it does perform some additional authentication. I don't remember what, but I recall that being said at a conference by someone from the MSFT FIM product group. So the digital signature may not be needed.David Lundell, Get your copy of FIM Best Practices Volume 1 http://blog.ilmbestpractices.com/2010/08/book-is-here-fim-best-practices-volume.html