How to troubleshoot a VSTO addin that does not load?
The addin was not starting due to this other excel application running (I was migrating an MSAccess application to VSTO), so Access had an automation app open hidden.
Error deploying VSTO Office addin - Stack Overflow
Jan 10, 2015 · I found a workaround by installing the addin using MSI. This Guide was a lot of help. Taken from the section about registry settings for the msi installation: It is important to …
excel - Programmatically Install Add-In VBA - Stack Overflow
Jan 25, 2014 · .AddIns.Add "Filepath to addin in shared location", False Any ideas on why Excel is expecting the addin to be in the users default folder?
How do you enable excel add-ins for all users using registry …
Jun 24, 2022 · I'm trying to enable an excel add-in for all users in a given lab (Office 2019 is installed). The path to the add-in's "OPEN" string in the registry is …
Add-In Error: Content is blocked because it isn't signed by a valid ...
Mar 28, 2022 · The easy solution that worked for me was remove .office-addin-dev-cer from User folder. Then by running my Add-Ins by npm start I got popped by a message box to remove …
What is the difference between a COM Add in and a VSTO Add in
Jan 26, 2012 · I have not personally found a need to use AddIn-Express, but you may find it helps you if you don't want to invest the time in learning the VSTO framework. This choice also …
Newest 'outlook-addin' Questions - Stack Overflow
Oct 17, 2025 · In a Mobile Outlook Addin, what is a good replacement for the unsupported (on Mobile) function Office.context.mailbox.item.getAsFileAsync? *the function above gets the …
How to force Microsoft Office Addin to use Edge Webview2 runtime
Oct 13, 2021 · I read this nice article from Microsoft explaining how the Addin runtime works. I am using Windows 10 Enterprise and the system has already Microsoft Edge WebView2: My …
vsto - Not a valid Office Add In - Stack Overflow
Sep 7, 2009 · I developed a new Office 2007 addin using VS 2008 and VSTO. after this I go to Office->Excel Options->AddIns->COM AddIns and GO... If I select the .dll which I ve created I …
How to troubleshoot why Excel disables an add-in?
Nov 4, 2015 · Blocking calls in your addin or in code that you are calling that might lead to a user killing a non-responsive Excel? Good luck tracking down the issue. Edit: I apologise, there are …