---
title: Click-to-Dial
slug: aci/click-to-dial
icon: {"lucideIcon":"PhoneCall"}
createdAt: 2026-10-26T22:52:13.453Z
---

Unaric ACI supports click-to-dial on the contact’s SIP address (their Microsoft 365 email or UPN) and phone numbers (PSTN calls).

## How it works

When the ACI component shows a contact’s Microsoft 365 email on a **Contact** or** Lead** page, you can click it to start a call. The call goes to that person’s Teams identity (their UPN/email) through the Unaric Voice for Teams Open CTI softphone in Salesforce.

::Image[]{src="https://api.archbee.com/api/optimize/10Nod6Ww95R3dPr0k0TCJ/UGAO6VpnV8NjUbN24Gb5J_image.png" size="60" isUploading="false" width="2528" height="1688" darkWidth="2528" darkHeight="1688" alt="Click on the email address to start a call" showCaption="false"}

After the call, the **Task** records the address in the **Call To UPN** field. ACI also identifies which Salesforce record the email call was made from, so the call can be linked to the right **Contact** or **Lead**.

:::hint{type="warning"}
Calling external Teams users by their SIP address only works if the two tenants allow federation with each other. If the other organisation blocks external access, ACI shows the “presence state lookup is blocked” error, and the call is likely affected by the same block.
:::