> For the complete documentation index, see [llms.txt](https://docs.slapfive.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.slapfive.com/integrations/microsoft/outlook-microsoft-365/connect-to-outlook.md).

# Connect to Outlook

Microsoft Outlook uses **Authorization Code Grant (Delegated Authentication)** for enabling SlapFive's automation engine to connect to Outlook to send emails. This method connects to Outlook using **delegated authentication**, meaning emails are sent **on behalf of a signed-in mailbox user.**

### Prerequisites

1. **A standard user mailbox exists**
   * Example: `reference@company.com` or `advocacy@company.com`
   * The mailbox must:
     * Be licensed for Exchange Online
     * Be able to sign in
     * Use MFA per tenant policy
2. **(Optional) Shared mailbox Send As**

   * If emails should come from a shared mailbox (e.g. `references@company.com`):
     * Connect with a service account that has **Send As** permission on the shared mailbox.
     * Send As is configured on the *shared mailbox*, not the user

   Example (PowerShell):

   ```powershell
   Add-RecipientPermission `
     -Identity references@company.com `
     -Trustee mattw@company.com `
     -AccessRights SendAs `
     -Confirm:$false
   ```

### Create the Outlook Connection in SlapFive

In SlapFive, go to **Settings > Integrations** and click to open the box named **Outlook Connection** and click the **Connect** button.

1. Sign in using the chosen mailbox user (or service account).
2. Complete MFA as required.
3. Approve Microsoft consent prompts.

No passwords are shared with SlapFive.

[CC-based auth](/integrations/microsoft/outlook-microsoft-365/connect-to-outlook-with-client-credentials-based-auth.md).