Availability of OnMessageReadWithCustomHeader for Web and New Outlook on Windows

Max Saraev 0 Reputation points
2025-01-31T16:53:03.2333333+00:00

Hello,

I would like to know when the OnMessageReadWithCustomHeader events will be available for Outlook on the web and the new Outlook for Windows. This feature is essential for our workflow, and we would appreciate any insights on its expected rollout timeline.

Is there an official roadmap or ETA for its release?

Thank you!

Outlook
Outlook
A family of Microsoft email and calendar products.
4,482 questions
JavaScript API
JavaScript API
An Office service that supports add-ins to interact with objects in Office client applications.
1,043 questions
Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
4,262 questions
0 comments No comments
{count} votes

2 answers

Sort by: Most helpful
  1. Q&A Assist
    2025-01-31T16:53:03.2466667+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The OnMessageReadWithCustomHeader event is currently in preview and is available only in Classic Outlook on Windows. There is no information provided in the context regarding its availability for Outlook on the web or the new Outlook for Windows, nor is there an official roadmap or estimated timeline for its release in those platforms.


    References:

    0 comments No comments

  2. ChristyZhang-MSFT 25,366 Reputation points Microsoft Vendor
    2025-02-03T02:26:41.8333333+00:00

    Hi @Max Saraev ,

    Welcome to our forum!

    Based on my research, i found that it's not available in Outlook on the web and the new Outlook for Windows. More information: Configure your Outlook add-in for event-based activation. And i didn't find any article mentioned when it will support.

    User's image

    Please kindly understand that many functions are not designed at present. It is recommended that you could post the functions you expect and your sincere suggestions on the website dedicated to collecting feedback. We sincerely welcome your suggestions, and thanks for your understanding and support!


    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.


Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.