Christophe L.

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    Dear Microsoft Graph developer,

    We are excited to announce that this feature is now available via Microsoft Graph beta endpoint for you to try. You can find more details on the release @ https://developer.microsoft.com/en-us/office/blogs/attaching-large-files-to-outlook-messages-in-microsoft-graph-preview/

    Please keep sharing your feedback, feature requests via the UserVoice forum.

    Thanks
    Sivaprakash Saripalli
    Senior Program Manager
    Microsoft Graph

    Christophe L. commented  · 

    Hello,

    I have the same issue than Pieter Nys. I am not able to upload attachments of 3.1MB.

    When using the old way of sending a post-request to '/v1.0/me/messages/ID/attachments', I get an http-response with statuscode 500. I guess because my total request size is around 4.1MB and the maximum is 4MB.

    When using the new way of creating an upload-session, I get an error-response with the message 'ErrorAttachmentSizeShouldNotBeLessThanMinimumSize'.

    This leaves me with no way of attaching an file with size 3.1MB.

    Thanks for looking @Sivaprakash Saripalli, @vsaripal

    Christophe L.

    Christophe L. supported this idea  · 

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