Using the Connect2Teams Mobile App

Connect2Teams is a business calling app for organizations using the ACS Call App. It brings the ACS Call App Teams calling capability to your iPhone or Android device, so you can make and receive work calls anywhere, over Wi-Fi or mobile data, with your Teams number as the caller ID.

With the Connect2Teams app, you can make and receive calls, send and receive text and picture messages (SMS/MMS) if your ConnecttoTeams account has this capability, and manage your Outlook contacts from your mobile device.

The app has five tabs at the bottom of the screen:

Dialer – place calls and view your assigned work number.
Contacts – search, view, and manage your contacts.
History – review your incoming, outgoing, and missed calls.
SMS – send and receive text messages and picture messages.
Settings – manage presence-based call pausing, send feature codes, and view your account.

Before you begin

Your organization's Enterprise Admin must configure your account as a CallApp user before you can sign in. This is the same setup used for the Call App in Microsoft Teams on desktop and in the browser, so no additional setup is needed for mobile.

Device requirements

iPhone: iPhone 12 or later, running iOS 16.0 or later.
Android: Android 8.0 or later.

Getting the app

iOS

On your iPhone or iPad, open the Connect2Teams App Store listing, or open the App Store and search for Connect2Teams.
Tap Get, then authenticate with your Apple ID if prompted.
When the installation finishes, tap Open.

Scan with camera

Android

On your Android device, open the Connect2Teams Google Play listing, or open the Google Play Store and search for Connect2Teams.
Tap Install, then confirm with your Google account or device authentication if prompted.
When the installation finishes, tap Open.

Scan with Android camera

Signing in

Open the Connect2Teams app.
When prompted, allow the app to use your microphone and to send notifications. The app needs microphone access to place calls and notification access to alert you to incoming calls.
Sign in with your Microsoft 365 work account, using the same credentials you use for Microsoft Teams.
Complete multi-factor authentication if your organization requires it.
If prompted, enable the Connect2Teams calling account in your device settings. This lets your work calls appear in the Recents list of your phone's built-in Phone app.

After you sign in, the app opens on the Dialer tab and is ready to make and receive calls.

Figure: Dialer tab

Use Connect2Teams for calling on your phone
On your phone, use the Connect2Teams app to make and receive work calls. Calling from the Unified Connector App inside Microsoft Teams Mobile is not supported, because Teams Mobile cannot open the dialer pop-out window that the app uses. If you open the Unified Connector App in Teams Mobile, you will see a prompt to install the Connect2Teams app.

Things to know

Connect2Teams works with your mobile phone's built-in calling features:

Incoming calls display a full-screen ring screen, even when your device is locked.
Your work calls appear in the Recents list of your phone's Phone app, alongside your cellular calls.

Microsoft Teams on desktop and on the web continues to work as before. You can use the Unified App Connector in Teams and the Connect2Teams mobile app with the same account.

Do Not Disturb and Focus: Incoming calls may be silenced if Connect2Teams is not included in your allowed calls and apps. On iOS, check your Focus settings under Calls and under app notifications. On Android, go to Settings > Notifications > Do Not Disturb > App exceptions.

Making a call

Tap the Dialer tab.
Enter the phone number on the keypad.
Tap the green call button to place the call.

You can also call a contact from the Contacts tab, or call back a number from the History tab. If a contact has more than one phone number, choose the number you want to call.

Figure: Dialer tab — keypad, Work number, and the “Turn off Incoming Calls” toggle

Figure: Call ringing — waiting for the other party to join

Figure: Dialer tab — keypad, Work number, and the “Turn off Incoming Calls” toggle

Receiving a call

When someone calls your work number, an incoming call alert displays the caller's number. If your device is locked, a full-screen ring screen appears.

Tap Accept to answer the call.
Tap Decline to reject the call.

If Turn off Incoming Calls is turned on in the Dialer tab, inbound calls do not ring in the app until you turn it off. For details, see Turning off incoming calls.

Figure: Incoming call alert

Figure: Call in progress

During a call

While on a call, use the call controls at the bottom of the screen to mute your microphone, switch the speaker on or off, or end the call. Tap the more-options (•••) button for additional controls:

Hold – place the caller on hold.
Transfer – transfer the call to another person or number.
Add – add another participant to the call.
DTMF – open a keypad to enter tones, for example to navigate a phone menu.

Figure: Active call — more-options menu showing Transfer

Transferring a call

While on a call, tap the more-options (•••) button.
Tap Transfer.
Choose the transfer type:
- Blind transfer – send the call to the destination immediately, without speaking to the recipient first.
- Warm (consult) transfer – speak to the recipient first, then complete the transfer.
Enter the destination phone number, then tap Transfer.

Figure: Transfer modes — Blind transfer or Warm (consult) transfer

Figure: Transfer — entering or selecting a destination number/contact

Turning off incoming calls

You may prefer to stop receiving call alerts in Microsoft Teams (desktop or web) and in the Connect2Teams app, and answer calls only on your desk phone. To do so:

Tap the Dialer tab.
Turn on the Turn off Incoming Calls toggle.

To start receiving calls in the app again, turn the toggle off.

If you do not see the toggle, your organization has not enabled this option, and incoming call alerts stay on.

Figure: Dialer tab — the “Turn off Incoming Calls” toggle

Managing contacts

The Contacts tab shows your personal Outlook contacts and your organization's directory contacts. On Android, organization contacts have a grey background to distinguish them from personal contacts.

Tap the Contacts tab.
Use the search bar to find a contact by name or number.
Tap a contact to view their details, then tap the call button next to a number to call it.

Figure: Contacts tab — search bar, contact list, and Add Contact button

Figure: An organization contact — you can call from here, but there's no way to edit it from this app

Adding and editing contacts

You can add and edit your personal Outlook contacts. Organization contacts are read-only.

To add a contact, tap the + button, enter the contact's details, and tap Save.
To edit a personal contact, open it and tap Edit Contact. Update the name, company, job title, or phone numbers. Tap Add phone number to add a number, or tap the remove button next to a number to delete it. Tap Save.

New and updated contacts can take up to about 15 minutes to appear in the app.

Figure: A personal Outlook contact — you can call from here, and it can be edited from this app

Figure: Edit Outlook contact screen

Call history

Tap the History tab.
Review your recent calls. An icon next to each call shows whether it was outgoing, incoming, or missed, along with the date, time, and duration.
Tap a call to open Call details. From there, you can call the number back or add it as a contact.

Figure: History tab — recent call list with call-type icons and durations

Figure: Call Details screen — Add Contact and call-back options

Sending text messages (SMS)

The SMS tab lets you send and receive text messages and picture messages using your organization's phone numbers, separately from your personal messaging apps. Conversations with unread messages appear in bold.

Tap the SMS tab to see your recent conversations.
If you have more than one assigned number, such as personal or group lines, tap the Message as drop-down and choose the number to send from and receive replies on.
Tap New to start a conversation.
In Enter Recipients, type a name or number. Matching contacts appear as you type; tap one to add it. You can add up to 10 recipients.
If you add more than one recipient, choose a send option:
- Broadcast SMS – each recipient receives the message privately and replies only to you. Use this for announcements, alerts, and individual follow-ups.
- Group SMS – all recipients share one conversation and see each other's replies. Use this for small-group discussions. This option appears only if your number supports group texting.
Type your message and tap the send button. To send a photo, tap the attachment (paperclip) icon, then take a photo or choose one from your library.

Messages and photos you receive appear in the conversation, with the sender's name or number and a timestamp.

SMS Tab

Message as selector

Starting a new message — Enter Recipients (max of 10)

Option to broadcast SMS or, if the number supports it, use group texting

Linking a number to a contact

When a message comes from a number that is not in your contacts, you can save it as a new Outlook contact or add it to an existing contact, so the conversation shows a name instead of a number.

In an open conversation, tap the contact icon in the top-right corner.
Choose an option:
- Add New Contact – create a new Outlook contact with the number already filled in. Complete the details and tap Save.
- Update Existing Contact – search for a contact by name, then tap the matching result to add the number to that contact.

Add new contact or update existing contact

Add New Contact — form pre-filled with the sender's number

Update Existing Contact — search and tap a result to link the number

Saving photos from a conversation

Tap a photo in the conversation to view it full screen.
Tap Download.
- iOS: In the share sheet, choose Save to Files. Saving directly to the Photos app is not supported.
- Android: The photo downloads to your device.

Figure: A text message and a photo reply in the same thread

Figure: Full-screen photo view with a Download option

Figure: iOS - Sharing a photo through the standard iOS share sheet

Settings

Tap the Settings tab to manage the following options.

Figure: Settings tab — Presence (Teams-presence-based call pausing) and Feature Codes

Presence

If your organization has enabled it, you can turn on Pause Inbound Calling based on Teams Presence. When this is on, inbound calls are paused automatically whenever your Microsoft Teams presence matches one of the selected trigger states, such as Busy, Do Not Disturb, In A Meeting, or In A Call.

Interval (minutes) – how often the app checks your Teams presence.
Trigger states – the presence states that pause inbound calls.

On Android, these presence settings are inherited from your organization's PBX defaults.

For more information, see the Pause Inbound Calling User Guide.

Feature codes

Under Feature Codes, search for a code (enter at least three characters) or use the shortcuts shown. Tap Send next to a code to send it. For example, send *78 to enable Do Not Disturb or *79 to disable it. The codes available to you depend on the feature codes your Enterprise Admin has enabled.

Account and sign out

Tap the three-dot menu in the top-right corner to view the app version and your signed-in account, or to sign out.

Figure: iOS: App info menu — version, signed-in account, and Sign out

Troubleshooting

Not receiving call or message alerts: Check that notifications are allowed for Connect2Teams. On iOS, confirm Focus or Do Not Disturb is not silencing the app. On Android, confirm Do Not Disturb and battery optimization settings are not restricting the app. Also check that Turn off Incoming Calls is off.
Unable to sign in: Confirm with your Enterprise Admin that your account is configured as a CallApp user.
No audio during calls: Confirm microphone access is allowed for Connect2Teams and that no other app is using the microphone.
Text message fails to send: Confirm you selected the correct number under Message as and that the message has 10 or fewer recipients.

If you still need help, contact your organization's IT administrator.