Microsoft Outlook Mail

The MicrosoftOutlookMail toolkit connects Arcade to the Microsoft Graph Mail API, enabling agents to read, compose, organize, search, and manage email in both personal and shared/delegated Outlook mailboxes.

Capabilities

Reading & searching mail — Retrieve individual messages (with pagination for long bodies), list messages by folder or conversation, search across the full mailbox by keyword and structured filters, and list attachment metadata. Both personal and shared mailboxes supported.
Composing & sending — Create and immediately send new emails, reply (single or all), forward, or send existing drafts. Returns message_id and conversation_id on send so follow-ups can be chained without re-querying.
Draft management — Create, revise, and save drafts (new, reply, reply-all, forward) without sending; send any draft on demand. CC additions and removals are supported during draft creation and reply.
Folder management — Create folders and subfolders (idempotent), list folders with unread/total counts, and move batches of up to 50 emails between folders (with a count_only dry-run mode).
Categorization & flags — Create, recolor, rename, and delete mailbox categories (labels); apply or remove categories on batches of emails; set read state and follow-up flags. Batch operations refuse jobs over 50 emails atomically.
Shared/delegated mailbox operations — A parallel set of tools covers every capability above for shared or delegated mailboxes (Full Access required for write operations; folder-level shares support read-only listing when scoped to a single folder). A capability-checker tool probes reachability before committing operations.

OAuth

This toolkit uses OAuth 2.0 via the Microsoft provider. See the Arcade Microsoft auth provider docs for setup instructions, required app registrations, and scope configuration.

	Tool name	Description	Secrets
	MicrosoftOutlookMail.CategorizeEmails	Put a category on emails in the user's own mailbox, or take one off, keeping every other category each email carries. One call for a list of ids, a whole thread, a search, or every email that already carries the category, reporting one outcome per email with its categories before and after. Select exactly one way. The category must already be in the mailbox's category list to be added, and this call cannot create one; a category that is no longer in the list can still be removed. An email already in the state asked for is a success that changed nothing, and a job needing more than 50 changes is refused whole rather than part-done. Tagging, labelling or categorizing mail is this call; it never moves the mail and never flags it.
	MicrosoftOutlookMail.CreateAndSendEmail	Create and immediately send a new email in Outlook to the specified recipients. Returns the sent message's ``message_id`` and ``conversation_id`` so callers can immediately chain follow-ups (e.g. reply to what they just sent) without having to search Sent Items. The confirmation message names how many recipient addresses the email went to across To, Cc and Bcc.
	MicrosoftOutlookMail.CreateDraftForward	Create a forward of an existing Outlook email, with its attachments, as an unsent draft. Recipients are optional, but the draft needs one before it can be sent. Returns the draft; its message_id is the draft's own id, used to revise or send it later.
	MicrosoftOutlookMail.CreateDraftReply	Create a reply or reply-all draft for an existing Outlook email without sending it. The draft is threaded to the original message and saved to the Drafts folder, so it can be reviewed, edited, and sent later. For a reply-all, the original recipients (excluding the mailbox owner) are populated automatically. Use cc_add to copy someone in on the draft, including someone who was never on the thread, and cc_remove to take somebody off the copied line; who the reply is addressed to is the thread's own and reply_type decides it. This tool never sends the email.
	MicrosoftOutlookMail.CreateMailFolder	Create a mail folder in the user's own Outlook mailbox, to keep related messages together. The folder is created in the signed-in user's own mailbox, and in no other: this tool cannot reach a mailbox named by address, whether a team mailbox or another person's. Safe to call for a folder that may already exist: an existing folder of the same name under the same parent is returned instead of a duplicate. A parent_folder that names no folder in the mailbox creates nothing.
	MicrosoftOutlookMail.DeleteEmailCategory	Delete a category (label or tag) from the user's own Outlook mailbox and take it off every email that carries it, in every folder. The category is deleted only once no email carries it. Up to 50 emails per call; a bigger job is refused before anything changes. Running it again finishes a call that stopped short. Calendar events and bounce reports keep the name. Taking a category off emails while keeping it is not this call.
	MicrosoftOutlookMail.ForwardEmail	Forward an existing email in Outlook, with its attachments, and send it immediately. At least one recipient is required across to_recipients, cc_recipients and bcc_recipients. Returns the forward's message_id, its conversation_id (the original thread's) and how many addresses it reached.
	MicrosoftOutlookMail.GetEmail	Retrieve a single email message by its ID. Returns email metadata, categories, and body content. By default, the body is returned as plain text (HTML tags stripped) and capped at 5000 characters. Set body_format to HTML to get the original markup. Use body_offset to continue reading long emails: body_total_characters reports how long the body is, and body_next_offset is where the next call resumes. Use this tool to read the full content of an email whose ID is already known, to see which categories it is tagged with, and to page through a body too long for one response.
	MicrosoftOutlookMail.ListEmailAttachments	List attachment metadata for an email message. Returns metadata only (name, size, type, etc.). Attachment content is not included. Use this tool when the user wants to know what files are attached to an email.
	MicrosoftOutlookMail.ListEmailCategories	List the categories (labels or tags) in the user's Outlook mailbox. Returns categories, not emails. Two names can look alike; use category_id to tell them apart. Emails can carry a category not in this list.
	MicrosoftOutlookMail.ListEmails	List email messages in the user's mailbox. Returns ordinary mail by default: Deleted Items, Junk Email, Sent Items and Drafts are left out unless named in folders, folder_ids or conversation_id. Rows carry a 255-character body preview unless include_body is set, which returns each message in full up to max_body_characters.
	MicrosoftOutlookMail.ListMailFolders	List mail folders in the user's mailbox. Returns folder names, IDs, unread counts, and total item counts. A returned folder ID is what scopes a mail listing to a user-created folder. Omit parent_folder_id to list top-level folders, or provide a folder ID to list its child folders.
	MicrosoftOutlookMail.MarkEmails	Set the read state or the follow-up flag on a selection of emails in the user's own mailbox. One call for a list of ids, a whole thread, or a search, reporting one outcome per email. Select exactly one way. An email already in the state asked for is a success that changed nothing, and a job needing more than 50 changes is refused whole rather than part-done. A request to star, pin, flag or follow up on mail is this call; it never moves the mail.
	MicrosoftOutlookMail.MoveEmails	Move a selection of emails into one folder in the user's own mailbox. Use this single call for a pile of emails instead of moving them one at a time: it takes a list of ids, a whole conversation, or a search, and reports one outcome per email. Select the emails exactly one way. Naming none, or naming two, is refused and moves nothing, as is a selection of more than 50 emails. A conversation spans folders, so filing a thread moves the unsent drafts and sent replies in it too unless folders narrows the selection. Run the request with count_only first when that matters: it reports which folders the mail would leave before anything moves. Anything the caller got wrong -- the selection, an id, a folder that names several folders or none -- is refused before the first email moves. After that, an email Outlook refuses is reported as a failed row beside the ones that moved rather than failing the whole request. Filing into junk is not a reversible hide: Outlook permanently deletes mail left in the Junk Email folder after 14 days, it does not report the sender to Microsoft, and it does not train the junk filter. Tell the user that before junking mail on their behalf. Outlook does not record where an email came from, so putting mail back is a move to the inbox like any other: name inbox as the destination, and name the folder it is coming out of in folders so mail sitting elsewhere is left alone.
	MicrosoftOutlookMail.RenameEmailCategory	Rename a category (label or tag) in the user's own Outlook mailbox, keeping it on every email that carries it, in every folder. Outlook cannot rename in place, so this creates the new name in the old one's colour, or uses it if it already exists, joining the emails to that category. It moves the tag on each email and deletes the old name only once no email carries it. Up to 50 emails per call; a bigger job is refused before anything changes. A call that stops short leaves both names, and running it again finishes it. Calendar events and bounce reports keep the old name. A change of letter case or surrounding spaces alone is not possible.
	MicrosoftOutlookMail.ReplyToEmail	Reply to an existing email in Outlook. Use this tool to reply to the sender or all recipients of the email. Specify the reply_type to determine the scope of the reply. Use cc_add to copy someone in on the reply, including someone who was never on the thread, and cc_remove to take somebody off the copied line; who the reply is addressed to is the thread's own and reply_type decides it. The confirmation message names how many recipient addresses the reply went to across To, Cc and Bcc, when Outlook reported both the To and Cc lines.
	MicrosoftOutlookMail.SaveDraftEmail	Save an email draft in Outlook, creating a new one or revising one that exists. Supplying message_id revises that draft; omitting it creates a new one. Only the fields supplied are written — anything left out keeps whatever the draft already had. Nothing is ever sent. Returns a DraftMessage. Its message_id identifies the saved draft and can be passed straight back to this tool to make further changes to it.
	MicrosoftOutlookMail.SaveEmailCategory	Create a category (label or tag) in the user's own Outlook mailbox, or recolor an existing one. Cannot add one to a shared mailbox. Does not rename categories or tag emails. Safe to repeat.
	MicrosoftOutlookMail.SearchEmails	Search emails across the user's entire mailbox. Combines full-text keyword search with structured filters for sender, read status, attachments, importance, and more. All provided parameters are combined with AND. At least one search criterion is required. folder, only_focused, include_body and limit narrow or page a result set rather than build one, so they are not enough on their own. Junk Email and Deleted Items are left out unless `folder` names one of them; sent mail and drafts stay searchable. Rows carry a 255-character body preview unless include_body is set. Results come back in the search index's own order and cannot be re-sorted. Outlook's search index answers one query with at most 1,000 messages, so a walk that runs out of pages has reached the end of what the index serves rather than the end of the mailbox. The folders left out, the Focused split and the exact category match are applied to those 1,000 after they are chosen, so a broad term matching a lot of junk can come back with few rows, or none, while matching mail exists. A narrower term reaches it; a smaller limit does not. Use this tool when the user wants to find emails by content, topic, sender, or a combination of criteria. .. note:: Microsoft Graph's ``$search`` on messages is backed by the Microsoft Search index, which returns message IDs in the legacy REST-ID format even when the client opts into Immutable IDs. Do not directly compare these message IDs with Immutable IDs; the formats differ. Use ``conversation_id`` to correlate conversations across result sets.
	MicrosoftOutlookMail.SendDraftEmail	Send an existing draft email in Outlook. Sends any un-sent message — draft, reply-draft, reply-all draft, or forward draft — and returns the message's ``message_id`` and ``conversation_id`` so callers can chain follow-ups (e.g. reply to the message they just sent) without searching Sent Items.
	MicrosoftOutlookMail.SharedMailboxCategorizeEmails	Put a category on emails in a shared or delegated mailbox, or take one off, keeping every other category each email carries. One call for a list of ids, a whole thread, a search, or every email that already carries the category, reporting one outcome per email with its categories before and after. Select exactly one way. The category must already be in that mailbox's category list to be added, and this call cannot create one; a category that is no longer in the list can still be removed. An email already in the state asked for is a success that changed nothing, and a job needing more than 50 changes is refused whole rather than part-done. Tagging, labelling or categorizing mail is this call; it never moves the mail and never flags it. Needs Full Access to the mailbox; a folder-level share is refused.
	MicrosoftOutlookMail.SharedMailboxCheckCapabilities	Check which provided mailboxes are reachable via shared mailbox APIs. This is a capability checker, not an Exchange permission inventory. It verifies whether each provided mailbox can be reached through a cheap, read-only Graph call. When checking multiple mailboxes, pass them together in one ``owner_emails`` list so results can be deduplicated and rate-limited consistently. Microsoft Graph does not expose exact ``Send As`` vs ``Send on behalf`` permissions, so the response names that limitation explicitly instead of guessing.
	MicrosoftOutlookMail.SharedMailboxCreateAndSendEmail	Create and immediately send an email from a shared or delegated mailbox. Use this when the user wants the email to be sent from a team inbox (like sales@ or support@) or from an executive's mailbox they have been delegated access to, rather than from their own address. The confirmation message names how many recipient addresses the email went to across To, Cc and Bcc.
	MicrosoftOutlookMail.SharedMailboxCreateDraftReply	Create a reply or reply-all draft in a shared or delegated mailbox without sending it. The draft is threaded to the original message and saved to the mailbox's Drafts folder, so it can be reviewed, edited, and sent later. For a reply-all, the original recipients (excluding the mailbox owner) are populated automatically. Use cc_add to copy someone in on the draft, including someone who was never on the thread, and cc_remove to take somebody off the copied line; who the reply is addressed to is the thread's own and reply_type decides it. This tool never sends the email.
	MicrosoftOutlookMail.SharedMailboxCreateMailFolder	Create a mail folder in a shared or delegated mailbox, to keep related messages together. Creates the folder in the mailbox `owner_email` names, which is what a request for a folder in a team mailbox, or in another person's, asks for. The folder id it returns addresses that mailbox only. Safe to call for a folder that may already exist: an existing folder of the same name under the same parent is returned instead of a duplicate. A parent_folder that names no folder in that mailbox creates nothing.

Microsoft Outlook Mail

Capabilities

OAuth

Available tools(36)

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