Outlook 2007 Add-In Does Not Load on Outlook 2013

Question

We have built a VTSO office add-in using Visual Studio 2008 (C#,vsto 2.0 runtime) targeting office 2007 as the minimum version. Works fine on 2007 and 2010 version of outlook, word, excel and power point. It is also working on 2013 version of word, excel and power point but do not load on outlook 2013. We do not get any kind of error message. Any help will be appreciated.

Thanks in advance, Vikas

Answer 1

1. Is it not showing any error when you set the environment variable "VSTO_SUPPRESSDISPLAYALERTS" with value "0"?

2. Did you also checked if it is in disabled items list in File => Options => Add-Ins => Manage choose disabled items?

Answer 2

Outlook 2013不支持针对2007的加载项。它仅支持2010加载项。