On April 9, 2024, Microsoft announced a big change in authentication for Outlook add-ins. It’s likely that people don’t realize the kind of change that’s coming. The change removes legacy Exchange authentication methods and replaces them with Nested App Authentication (NAA). Time is running short for developers to upgrade and test their code and Microsoft 365 tenants to get ready for the changeover.
The Share to Teams Outlook add-in posts an email to a Teams chat or channel conversation. I was asked how to disable the add-in for some mailboxes. Here’s how to do the job using PowerShell to find a set of target mailboxes and then turn off Send to Teams for each mailbox.
A recent Practical365.com article got me thinking about the Report Message and Report Phishing Outlook add-ins and how the new Monarch client can’t use COM add-ins. Microsoft is busily updating its add-ins to move away from COM to embrace the new approach based on HTML and JavaScript. If Microsoft is taking this action, I hope the same is happening in ISVs and in-house development teams who generated COM add-ins in the past.