Add an attachment greater than 3MB to an O365 mail via Graph APIhttps://community.appian.com/discussions/f/integrations/37421/add-an-attachment-greater-than-3mb-to-an-o365-mail-via-graph-apiwe are looking to use the MS Graph API to create and send emails our issue relates to an odd behaviour we are experiencing when attaching large files. All attachments under 3mb work as expected. Per MS documentation when attaching &gt;3mb we should useen-USTelligent Community 12RE: Add an attachment greater than 3MB to an O365 mail via Graph APIhttps://community.appian.com/thread/154857?ContentTypeID=1Mon, 08 Jun 2026 16:48:33 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:545a2097-e1b2-4ccf-b4cd-5252c12036fdGuy<p>Appreciate this is a 2 year old post, but if you can share how you sent emails with attachments, and what I&#39;m doing wrong here, I&#39;d really appreciate it!</p> <p><img style="max-height:240px;max-width:320px;" alt=" " src="/resized-image/__size/640x480/__key/communityserver-discussions-components-files/18/2046.Screenshot-2026_2D00_06_2D00_08-174058.png" /></p><div style="clear:both;"></div>