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Office 2007 pias and Office 2010

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I have a client who is using our plugin with their Outlook 2007 install. They recently installed Visio 2010 on their systems. The Office 2010 updates that are coming down from Microsoft are causing out plugin to crash in Outlook 2007 because our pias are not being recognized or overridden. Has anyone else ran into this problem? And if so what is the best way to handle this scenario.

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Monday, October 3, 2011 1:41 PM

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Hi Rick,

VSTO add-in is version-sensitive, which means that add-ins for Office 2007 don't work for Office 2010. Installing Visio 2010 will modify the registry, which causes that the target machine identified as Office 2010 installed.

http://blogs.msdn.com/b/andreww/archive/2007/06/08/why-is-vs-development-not-supported-with-multiple-versions-of-office.aspx

You can try to fix the issue by migrate your add-in to Outlook 2010 and deploy it in such machines.

I hope this helps.
Best Regards, Calvin Gao [MSFT]
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Please remember to mark the replies as answers if they help and unmark them if they provide no help.
- Marked as answer by Calvin_Gao Tuesday, October 25, 2011 1:38 PM
Tuesday, October 4, 2011 6:50 AM