Add-in Express compatibility with new Outlook for Windows

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Add-in Express compatibility with new Outlook for Windows
 
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Tomasz Krzyzak




Posts: 3
Joined: 2023-05-26
According to article https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/get-started/migrate-com-to-web-addins new version of outlook will not support com add-ins.
My question is:
Will it be still possible to use add-inn express to create add-in for new outlook? Will Add-in express be compatible with new outlook?
Posted 07 Oct, 2024 07:01:28 Top
Andrei Smolin


Add-in Express team


Posts: 19011
Joined: 2006-05-11
Hello Tomasz,

Tomasz Krzyzak writes:
According to article https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/get-started/migrate-com-to-web-addins new version of outlook will not support com add-ins.


No-no-no. The article describes two products called Outlook: the first one is called new Outlook for Windows, the other is classic Outlook for Windows. What they say is: the new Outlook for Windows doesn't support COM Add-ins. They DO NOT say "the new version of the classic Outlook for Windows won't support COM Add-ins"; actually, they say nothing about the new version of the classic Outlook for Windows; they also say nothing about the future of this product.

The new Outlook for Windows is a Windows app containing a web-browser component pointing to the web-based Outlook. This is why it doesn’t load COM add-ins.

Note that there are these Outlooks: the new Outlook for Windows, the classic Outlook for Windows, the web-based Outlook, Outlooks on Macs and mobile. If you need to support this zoo, you'll need to develop is a JavaScript-based add-in; such add-ins are called Office Add-ins; in the article they are called web add-ins. The starting point is at https://learn.microsoft.com/en-us/office/dev/add-ins/overview/office-add-ins. Such an add-in would be loaded in Outlook on Windows Desktop, Macs, mobile and web. The Outlook object model available for such add-ins is very different from what you have in your desktop Outlook.

Add-in Express only supports developing COM Add-ins. There will be no Add-in Express version for web add-ins: according to our guys who researched this area, there’s no place for a common set of features in this case.

Regards from Poland (GMT+2),

Andrei Smolin
Add-in Express Team Leader
Posted 07 Oct, 2024 08:37:12 Top