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Connect a Microsoft mailbox by signing in with Microsoft. There is no password to enter and no server address to look up. Microsoft handles the sign-in, and you only confirm what the account is allowed to be used for.
Where
Integrations→Integrations→Email Accounts
Your role needs
Read access to Email Accounts read-senders. Admin, Member and Viewer have it by default.
To create or change
create-senders to add one, update-senders to change one, on top of the permission above.
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Before you begin

  • A Microsoft mailbox you can sign into. The sign-in goes to Microsoft’s shared sign-in endpoint, the one that serves both Outlook.com addresses and Microsoft 365 work or school accounts.
  • On a work or school account, your tenant may require an administrator to approve access before anyone can grant it. See Troubleshooting below.

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Connect the mailbox

1

Open the provider list

Go to and choose Add senders, then Connect.Gmail and Outlook lead the list as the two featured cards, and Outlook’s carries a 1-click badge (1). Choose Outlook.Every other provider in the grid below asks for the mailbox password, and most of them fill in the server settings for you. Outlook is the only card that asks for no password at all.
2

Review what you're granting

Before the browser leaves the app, this screen lists what the mailbox will be used for: sending emails on your behalf, reading replies so your AI agents can answer, and seeing your name and email address.It also says plainly: “We never see your password, and you can disconnect anytime from your Microsoft account.” Choose Continue with Microsoft when you’re ready.
3

Sign in and approve access

The next step happens on Microsoft’s own sign-in page, on Microsoft’s own domain. Sign in with the mailbox you want to connect, then approve the access.Four permissions are requested, and Microsoft describes them in its own words: signing you in and reading your basic profile, sending mail as you, read and write access to your mailboxes over IMAP, and keeping that access after you close the browser. The last one is what lets sending and reply-reading carry on without you signing in again. The IMAP permission is wider than the “read replies” line on the previous screen: it is the standard mailbox scope, not a replies-only one.
4

You're back

Microsoft sends you straight back to the app, onto the new account’s own page, with the overlay on top confirming the connection. Choose Done to close it. Add another sender goes back to the provider list instead.The confirmation does not name the mailbox it just connected. The address is on the account page behind it.

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What happens next

The mailbox is on the Email Accounts page, as Active if the connection tested clean.
The confirmation screen says what happens from there: “Your sender is live. We’ll pace its sending automatically to protect deliverability.” That screen reports that the round trip finished, not that the mailbox works. Right after Microsoft hands the account over we test the access we were given and register the mailbox for sending. If either step fails the account is still created, and still returns you to this screen. It lands on the list as Error instead, with the reason beside it. The list is what to trust.

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Troubleshooting

An account is only created once Microsoft has handed over a token, so a sign-in you cancelled, declined, or that failed for any other reason connects nothing and leaves nothing to clean up.It also will not return you to the overlay. Instead of landing back on Email Accounts you stop on an error page, with none of the wording above. That is the whole of the failure: go back to and start again.
A Microsoft 365 tenant can require an administrator to approve an application before anyone in the tenant is allowed to grant it access. Until that approval exists the sign-in cannot finish, and no account is created.The fix is not on your side. Ask your administrator to approve access for the app, then start again from the provider list. Nothing on this end needs undoing first.
Access granted once can be withdrawn later: the account is removed, the password changes, or someone revokes access in Microsoft’s own security settings. A scheduled check notices and moves the account to Error with “OAuth authorization is no longer valid — the account may have been deleted or access revoked. Please reconnect.”Reconnect, in the red banner on the account’s own page, re-tests the access already granted rather than opening a new sign-in. If the access still works the account recovers. If it really was withdrawn, the account stays in Error with a message starting “OAuth verification failed”, and the mailbox has to be connected again from the start. See Fix an email account in Error.

Add senders

Connect, import a CSV, or order managed infrastructure: how to choose between them.

Reconnect an account

What Reconnect actually does, and every Error message explained.

Email account statuses

Active, Paused and Error, and the chips that aren’t a status at all.

Connect Gmail or Google Workspace

The other featured provider, connected with an app password instead of a sign-in.