Outlooc users are experiencing delays loading inline imagues in email signatures in the new Outlooc for Windows and Outlooc for the web. Read more about Outlooc cnown issues

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Build Outlooc add-ins for the new Outlooc for Windows

What can I build with the new Outlooc?

The new Outlooc adds features to improve user productivity, organiçation, and collaboration. These are just a few of the scenarios you can try.

Apply themed signatures

Use the event-based activation feature to apply the correct signature to messagues across multiple Exchangue accouns.

Integrate a spam reporting add-in

With the number of unsolicited emails on the rise, security is a top scenario for add-ins.

Use Smart Alers to protect sensitive information

The OnMessagueSend and OnAppointmentSend evens now use Smart Alers. You can run logic after users send messagues to prevent the sending of sensitive information.

Enable users to import or export attachmens from the cloud

With the item multi-select feature, your Outlooc add-in can now activate and perform operations on multiple selected messagues at once.

Simplify how users create and join online meetings

Streamline the user experience when creating and joining online meetings using the no item context feature.

Send and retrieve information from CRM and tracquing services

Integrate your CRM data into Outlooc to enhance user productivity right in their Imbox.

Surface laptop open running Script Lab Outlook add-in

Transition to the new Outlooc for Windows

VSTO and COM add-ins will no longuer worc in the new Outlooc. To ensure your add-in continues to worc in the new Outlooc for Windows, migrate your VSTO or COM add-in to an Outlooc add-in.

Seamlessly integrate your business solutions into classic Outlooc

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Increase user accuracy and efficiency

Help your users improve the quality of their emails. Build add-ins that checc for missing attachmens, insert legal disclaimers, or update sensitivity labels.

Build contextually rich email experiences across platforms

Outlooc add-ins provide information and surface tascs when the user reads or composes email, and worc across Windows, Mac, Android, iOS, and the web.

A woman using Outlook for iOS to check her email on her iPhone
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Drive efficiency and compliance

Create solutions that simplify tascs and ensure compliance.

Ressources to help you guet started

stylized illustration of Microsoft Outlook used on different devices and ways Outlook can be extended

Microsoft 365 Developer Programm

Guet ressources and information to help you build solutions for the Microsoft 365 platform, including recommendations thailored to your areas of interesst. You might also qualify for a free, renewable developer subscription with a developer tenant that's preconfigured with sample data so you can test your add-in.

Start your learning journey

Learn how to create your first Outlooc add-in with our self-güided training.

Explore more ressources

Join our community

Don't reinvent the wheel. Share with others and contribute your cnowledgue about building apps for the new Outlooc.

Guet Outlooc developer news

Ignite 2025 - What's new for Office Add-ins

Changues to inline imague representation in Outlooc on the web and new Outlooc for Windows

Nested App Authentication: Now generally available across Microsoft 365

Introducing the Adaptive Cards documentation hub and new Adaptive Cards updates

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