# Mobile POS Application - Initial Configuration

Before starting the Maitre'D MPOS application, make sure that:

* The Maitre'D Back-Office Server is up-and-running.
* The Maitre'D 7 Communication Server service is running on the Maitre'D Back-Office. ([See Maitre'D Communication Server](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/maitred-communication-server))
* The Maitre'D POS Bridge service is running on the Maitre'D Back-Office. (See [Verify POS Bridge Installation](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/pos-bridge/verify-pos-bridge-installation))

1. Start the application using the MPOS icon on your Android or iOS device.

![MPOS Icon](https://documentation.payfacto.com/POS/MaitreD/Fulldoc/assets/images/Chap05/MobilePOS/MPOSApp/03-MPOSIcon.png)

2. The first time the application is started, it will ask for the Maitre'D Back-Office DNS Name or IP address and the POS Number.

![MPOS Configuration - BLANK](https://documentation.payfacto.com/POS/MaitreD/Fulldoc/assets/images/Chap05/MobilePOS/MPOSApp/04b-Config1.png)

#### Maitre'D Back-Office DNS or IP

Type the DNS name of the PC where the Maitre'D Back-Office is installed, or its IP address.

#### POS Number

Type the POS number you wish to use for this device. The corresponding POS must be configured as a mobile device in the Maitre'D Back-Office, under Point of Sale Control > Workstation > Options... > \[POS #] > Advanced > Operating System.

1. Once the information is filled in, press the Enter button.

![MPOS Configuration - FILLED](https://documentation.payfacto.com/POS/MaitreD/Fulldoc/assets/images/Chap05/MobilePOS/MPOSApp/06b-POSNumber.png)

2. The application will connect to the Maitre'D Back-Office.

![MPOS Connection Progress](https://documentation.payfacto.com/POS/MaitreD/Fulldoc/assets/images/Chap05/MobilePOS/MPOSApp/07-Connecting.png)

3. Once connected to the Maitre'D Back-Office, the POS Login screen will appear.

![MPOS Running](https://documentation.payfacto.com/POS/MaitreD/Fulldoc/assets/images/Chap05/MobilePOS/MPOSApp/08-MPOSConnected.png)

Related Topics

1. [Mobile POS Application Installation - Android](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/mobile-pos-app-install-and-config/mobile-pos-application-installation-android)
2. [Mobile POS Application - Initial Configuration](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/mobile-pos-app-install-and-config/mobile-pos-application-initial-configuration)
3. [Mobile POS Application - Basics](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/mobile-pos-app-install-and-config/mobile-pos-application-basics)
4. [Mobile POS Application - Download UI Assets](https://docs.payfacto.com/payfacto-knowledge/maitred-pos/maitred/maitred-complete-online-documentation/chap-5-configuring-and-managing-work/mobile-pos/mobile-pos-app-install-and-config/mobile-pos-application-download-ui-assets)