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Connect an Outlook or Microsoft 365 mailbox

Connect an Outlook.com or Microsoft 365 shared address to Trupeo, including the case where your tenant requires admin consent.

Updated on July 24, 2026

An address on @outlook.com, @hotmail.com or @live.com, and an address on your own domain hosted by Microsoft 365, both connect through Microsoft sign-in. Trupeo recognizes these mailboxes from the domain of the address and from how that domain routes its mail.

What you need

Access to the Microsoft account of the shared mailbox. The account you sign in with is the mailbox that gets connected to Trupeo, so sign in as the shared address itself, not as your own work account.

If you cannot sign in to that address, the account owner should complete the Microsoft authorization alongside you. They enter the password only on Microsoft’s page and do not give it to you or to Trupeo.

The steps

  1. In Trupeo, on the “Which mailbox do you want to connect?” screen, enter the shared address, then “Continue”.
  2. Trupeo shows the “Connect Microsoft” screen. Click the “Connect Microsoft” button.
  3. Sign in with the account of the shared mailbox on the Microsoft page, then accept the permissions being requested.

Read the account name on the Microsoft page before you approve. Trupeo does not check it here: unlike a Google connection, it accepts whichever account Microsoft hands back. If your browser is already signed in to another Microsoft account, and on a work computer it usually is, Microsoft goes straight through with that one and Trupeo starts syncing that person’s mailbox into your shared inbox. Sign out of Microsoft first, or use a private window, if you are not sure.

What Trupeo asks for, and why

Microsoft asks you to accept these accesses:

  • Read and write mail in that mailbox: show the conversations in Trupeo, mark a message as read, keep both sides in step.
  • Send mail from that address, so your team replies from the shared address instead of from their own inbox.
  • Your name and address, to check which mailbox was just authorized.
  • Stay signed in, so syncing keeps running without asking you to authorize again every day.

Many Microsoft 365 organizations do not let their users approve an external application on their own. When that is the case, Microsoft stops at the last step and tells you that an administrator has to approve it.

Ask your administrator to approve the Trupeo application for your organization, giving them the shared address concerned. Once the approval is done, start the flow again from the beginning: there is nothing to undo on your side in the meantime.

One rarer refusal: if Microsoft reports the account’s primary address as a generated address of the form outlook_...@outlook.com instead of your shared address, Trupeo refuses the connection, because it cannot then guarantee that messages will leave from the right address. Set the shared address as the primary alias of the Microsoft account, then start the connection again.

After connecting

Trupeo imports your history in the background. The first messages appear quickly, a large mailbox takes longer, and you can use the inbox during the import.

If this is your first mailbox, what comes next is described in Connect your first mailbox.