We have exciting news for you: Public Developer Preview is now live! This is a brand new feature that allows you to preview upcoming features in Microsoft Teams. We wanted to give all you aspiring and established developers early access to new features so you can build your own apps with those features in mind.


The details

With this preview, you'll be able to view and use new features before they're released to the general public. This will give you a clear picture of what's coming next for Teams, so you can build your own apps with compose extensions, bots, tabs, or connectors around future functionality.


For example, if you enable Public Developer Preview right now, you'll get a sneak peek at our new Discover Apps Gallery where you can browse all available apps, try out the new compose extensions, and see what's new with our bot APIs.



 Since the features included in this preview are not final, they may undergo changes before they're released in the public version of Teams. To help you keep track of what you're previewing, we put together an online list of all the features that are currently available in preview. That makes it easier to keep tabs on what's coming.


Sounds great, how do I get it? 

Before you can enable Public Developer Preview in Teams, you'll need to turn on the setting that allows you to side-load an app (you can find more detailed directions here). After that, all you need to do is head over to Teams and open up your Settings (click on your profile picture). Select About, then you'll see a menu that includes an option to switch to Developer preview mode.  





Select that option, and Teams will re-launch immediately. Once it's up and running, it'll include all our pre-release features, and you're free to explore!


This preview is available for anyone that wants it, and, unlike other preview groups for Microsoft Teams, you won't be required to sign an NDA since you'll only be previewing features that aren't currently marked 'Microsoft Confidential'. If you ever want to switch back to your previous version of Teams, just head back to your Settings menu and deselect the Developer preview option. You'll revert to your previous version in moments. We hope you have fun exploring our upcoming features!


Questions or comments? Email microsoftteamsdev@microsoft.com.



Developer preview announcement on msdn.com

Developer platform overview

List of all preview features

Submitting your app to the Office Store



Great to see this rolling out! I know the team has been working hard on this!

Occasional Contributor

Hi, I've enabled the setting for enabling sideloading of apps in Microsoft Teams, but I don't have the option to turn on the "developer preview" in my client. It's the latest version of MS Teams, so I'm unsure how to get this going for me. Environment is Office 365 E3 licenses; Office 2016 locally installed on Windows 10.






Alan Smith

New Contributor

Will this allow me to get notifications from connectors? 🙄 Still need that very important feature to switch from Slack.