Outlook’s slow add-ins resiliency logic and how to always enable slow add-ins

Overview This post explains how to deploy registry settings that would force Outlook to always load a specific add-in. The information in this post only applies to slow (VSTO) add-ins. If Outlook disables your add-in to prevent a crash, this blog post isn’t for you. Requirements Outlook 2013 or 2016. Information Outlook 2013 and 2016’s…

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Drag and Drop from Outlook 2010 (Part 2 – Windows Forms Application)

As described in a previous blog, there is unfortunately a known issue with drag/drop and Outlook 2010.  The previous blog describes the issue and also demonstrates a workaround that can be used when needing to implement drag/drop in an Outlook add-in.  A recent case highlighted another scenario in which the issue occurs, though – if…

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Create an add-in for Outlook 2007 and 2010 in one solution

Outlook add-ins seem popular again at the moment (we seem to go through phases as to the kind of cases that come in), and one question that has come up a few times now is how to create an add-in that targets both Outlook 2007 and 2010.  Fortunately, so long as you are using Visual…

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Outlook Add-in: Monitor add-ins load time

An Extensibility Add-in code sample for monitoring Add-ins load time in Outlook: The add-in uses the OnStartupComplete event, gets the Outlook process start time and writes an event in the Application event log. The event will be similar to: Log Name:       Application Source:            Outlook Startup Monitor Date:               27/01/2012 14:22:54 Event ID:          1 Task Category: None…

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Drag and Drop from Outlook 2010 (Part 1 – Outlook Add-in)

We have had a few cases come up recently to do with issues implementing drag and drop in an Outlook add-in.  There is an issue in Outlook 2010 that doesn’t release selected items once they have been dragged to a drop-target.  This means that once the drag/drop operation has been completed, the items selected during…

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