Microsoft.Office.Outlook.dll Compatibility Challenges b/w Outlook & New Outlook (Office 365)

Copper Contributor

We are currently using the Microsoft.Office.Outlook.dll for COM interop with Outlook versions 2013, 2016, and 2019. This approach allows us to manage Outlook contacts programmatically within these versions effectively. However, the new Outlook app based on Office 365 does not support this DLL, posing a significant challenge.

The primary issue is the incompatibility of Microsoft.Office.Outlook.dll with the new Outlook app. This new version, which is part of the Office 365 suite, does not recognize the DLL, rendering our existing integration methods obsolete.


Are there any plans to extend the compatibility of the Microsoft.Office.Outlook.dll to support the new Outlook app based on Office 365? If not, are there alternative APIs or libraries recommended by Microsoft for this purpose?

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