Need supported OWA deep link to open full email conversation from third-party app

Question

Need supported OWA deep link to open full email conversation from third-party app

Aleena 0

We need to open a full Outlook on the web conversation (original + replies) from our app for the signed-in user. Graph webLink only opens one message. /mail/deeplink/readconv/{conversationId} sometimes shows the full thread and sometimes only the latest reply, even when Graph returns multiple messages for that conversationId. Is there a documented, supported deep link for full conversation view?

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Answer 1

Hi @Aleena

At this time, I have not been able to find any Microsoft documentation that officially documents or supports Outlook on the web (OWA) deep-link endpoints for opening email conversations. The only documented message navigation mechanism I found is the Microsoft Graph message.webLink property, which Microsoft describes as the URL used to open a specific message in Outlook on the web. Therefore, I could not find any documented Microsoft endpoint or supported deep-link format that guarantees opening a full conversation/thread view based on conversationId, as requested.

Reference: https://learn.microsoft.com/en-us/graph/api/message-get?view=graph-rest-1.0&tabs=http

Please note that this summary is based on my own findings and may not fully address your concerns. To help you reach your goal more effectively, I recommend engaging with [GitHub Community Forum] for a deeper technical dive or to connect with individuals who have relevant experience and expertise. Some approaches may behave differently or be restricted depending on your specific environment and configuration. These forums include many experienced developers and Microsoft specialists who can assist with troubleshooting and guidance.

If you have any additional concerns, feel free to comment below. I would be more than happy to assist.