Item not found
This message shows up in 2 different situations. Pick the one that matches yours:
- Microsoft To-Do (/me/todo) needs an Exchange mailbox — admin accounts 404404 "Item not found" on admin/cloud-only accounts is not a 403; Planner works without a mailboxCause and fix →
- A mail-permission probe that can't tell "no mailbox" from "no consent" lies to admins/me/messages 404 MailboxNotEnabled* on mailbox-less accounts ≠ missing consent; three verdicts, and never cache a negative probe resultCause and fix →