Graph API shape
The workbook must contain a table. Your bridge can receive `lead.created`, authenticate to Microsoft Graph, and add a row to the table.
POST https://graph.microsoft.com/v1.0/me/drive/items/{item-id}/workbook/tables/{table-name}/rows/add
Authorization: Bearer ACCESS_TOKEN
Content-Type: application/json
{
"values": [[
"2026-05-25T05:00:00Z",
"Jamie Lee",
"jamie@example.com",
"+15555550123",
"google_ads"
]]
}