413 Payload Too Large
Situations in the vault where SharePoint, SPFx, Microsoft Graph or the Azure services around them answer with HTTP 413. Each one explains why it happens and how to fix it.
- A screenshot pasted into a support form is too big for /me/sendMail — shrink it client-sidegotchas / graphInline base64 attachments share a ~4 MB request budget; shrink bitmaps in a canvas, cap the total, and remember mailto: fallbacks carry no attachments at all