Availability of OnMessageReadWithCustomHeader for Web and New Outlook on Windows

Question

Availability of OnMessageReadWithCustomHeader for Web and New Outlook on Windows

Max Saraev 25

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!

SokiGuo-MSFT 31,741 Reputation points Microsoft External Staff

2025-03-04T05:53:05.93+00:00

Hi @Max Saraev ,

Did you need any more help with this question? If not, could you please mark "Accept Answer" on the appropriate answer so other users can reference it?And, if you have any further questions do let us know.

Answer accepted by question author

ChristyZhang-MSFT 26,226 Microsoft External Staff

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.

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ChristyZhang-MSFT 26,226 Reputation points Microsoft External Staff

2025-02-05T06:40:48.4533333+00:00

Hi @Max Saraev ,

Just checking in to see if above information was helpful. If it is useful, would you mind marking the helpful post as an answer? Which would benefit others who also has similar issues in forum.
Max Saraev 25 Reputation points

2025-02-07T10:42:36.3933333+00:00

Hi @ChristyZhang-MSFT thanks for your reply. We appreciate the information you provided and have submitted a feature request. However, it does not clarify when the feature will be available. This is a highly valuable feature for Outlook add-ins and was previously available in COM add-ins.
ChristyZhang-MSFT 26,226 Reputation points Microsoft External Staff

2025-02-21T05:22:24.2666667+00:00

Hi @Max Saraev ,

Thanks for your reply!

Hope Microsoft will notice your feedback soon. By the way, if you don't mind, you can click the "Accept Answer" button under the post so that it could be beneficial to others in the community looking for help on similar topics.

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Your answer

SokiGuo-MSFT 31,741 Reputation points Microsoft External Staff

2025-03-04T05:53:05.93+00:00

Hi @Max Saraev ,

Did you need any more help with this question? If not, could you please mark "Accept Answer" on the appropriate answer so other users can reference it?And, if you have any further questions do let us know.
ChristyZhang-MSFT 26,226 Reputation points Microsoft External Staff

2025-02-05T06:40:48.4533333+00:00

Hi @Max Saraev ,

Just checking in to see if above information was helpful. If it is useful, would you mind marking the helpful post as an answer? Which would benefit others who also has similar issues in forum.
Max Saraev 25 Reputation points

2025-02-07T10:42:36.3933333+00:00

Hi @ChristyZhang-MSFT thanks for your reply. We appreciate the information you provided and have submitted a feature request. However, it does not clarify when the feature will be available. This is a highly valuable feature for Outlook add-ins and was previously available in COM add-ins.
ChristyZhang-MSFT 26,226 Reputation points Microsoft External Staff

2025-02-21T05:22:24.2666667+00:00

Hi @Max Saraev ,

Thanks for your reply!

Hope Microsoft will notice your feedback soon. By the way, if you don't mind, you can click the "Accept Answer" button under the post so that it could be beneficial to others in the community looking for help on similar topics.

Answer 1

Aleksandar Trkulja | Dytech IT Solutions GmbH 0

*I wanted to follow up and ask if there are any updates regarding this feature. Could you provide any new information or an updated timeline regarding this?
Thanks.

Best regards*

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Answer 2

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.

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Availability of OnMessageReadWithCustomHeader for Web and New Outlook on Windows

2 additional answers

Your answer