Cutom Outlook Add-in is conflicting with SalesForce's Outlook add-in

Question

Hello,
We've developed one custom MS outlook add-in and installed it for Microsoft Outlook 2013.
It is failing with some of the functionalities where SalesForce's Outlook add-in is deployed and activated.
As soon as user deactivates it, our custom add-in runs as expected.
Technical details:
In our custom outlook add-in, we've attached an event handler with MailItem's SENT folder's ItemAdded event. 
The code of this event gets triggered and do the job only when user disables the SalesForce's Outlook add-in.
Can anybody please advise how to get rid of this conflict? It's really urgent.
Any help would be much appreciated.
Thanks,
Ankit
Thanks, <b>Ankit Shah</b> <hr> Inkey Solutions, India. <hr> Microsoft Certified Business Management Solutions Professionals <hr> http://ankit.inkeysolutions.com

Answer 1

Hello Dmitry,
Thank you for the response.
I would like to explain the flow again -
1. I have given a custom button in the ribbon - "Send"
2. On click of that button, I add a custom property to my mail item object & call the .Send() method on it.
3. Eventually, I get my "Application_ItemSend" event handler called where I check for the custom property on the mailItem & if found, I attach the "ItemAdd" handler as
below -
//Attach the Event Handler.
mailItemSendFolder = mailItem.SaveSentMessageFolder;
mailItemSendFolder.Items.ItemAdd += SentItems_ItemAdd;
4. In ideal situation, my "SentItems_ItemAdd" is getting called. But on machine where we have this salesforce add-in enabled/active, this event handler is not getting called &
hence, my functionality is not getting executed.
Hope, I have made the implementation more clear.
Request you to please feel free to come up with any additional queries (if any).
Thanks.
Thanks, <b>Ankit Shah</b> <hr> Inkey Solutions, India. <hr> Microsoft Certified Business Management Solutions Professionals <hr> http://ankit.inkeysolutions.com