# iOS - MobileDeviceManagement (MDM) protocol

SCA uses a standard protocol, the [Mobile Device Management (MDM) protocol](https://developer.apple.com/business/documentation/MDM-Protocol-Reference.pdf) from Apple. \
You can use any EMM provider for our app (e.g. Microsoft Intune, MobileIron, Jamf, Airwatch, XenMobile...).\
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To cause the device to poll the MDM server for commands, the MDM server sends a notification through the APNS gateway to the device. This message gets sent via the push notification service.

Configuring the user UPN setting is **required** for devices that are managed by Intune or a third-party EMM solution to identify the enrolled user account for the sending *policy managed app* when transferring data to an iOS managed app. The UPN configuration works with the app protection policies you deploy from Intune.<br>

### How to manage data transfer between SCA and iOS Apps

In case you have managed Devices in Intune (not MAM-WE), it is mandatory to use the IntuneMAMUPN ConfigurationKey in App Configuration Policy for Intune, for App Protection Policy.

The exact syntax of the key/value pair for SCA may differ based on your third-party MDM provider. The following table shows examples of third-party MDM providers and the exact values you should enter for the key/value pair.

<table><thead><tr><th>Third-party MDM provider</th><th>Configuration Key</th><th width="123">Value Type</th><th>Configuration Value</th></tr></thead><tbody><tr><td>Microsoft Intune</td><td>IntuneMAMUPN</td><td>String</td><td>{{userprincipalname}}</td></tr><tr><td>Microsoft Intune</td><td>IntuneMAMOID</td><td>String</td><td>{{userid}}</td></tr><tr><td>VMware AirWatch</td><td>IntuneMAMUPN</td><td>String</td><td>{UserPrincipalName}</td></tr><tr><td>MobileIron</td><td>IntuneMAMUPN</td><td>String</td><td>${userUPN} <strong>or</strong> ${userEmailAddress}</td></tr><tr><td>Citrix Endpoint Management</td><td>IntuneMAMUPN</td><td>String</td><td>${user.userprincipalname}</td></tr><tr><td>ManageEngine Mobile Device Manager</td><td>IntuneMAMUPN</td><td>String</td><td>%upn%</td></tr></tbody></table>

{% hint style="info" %}
For more information about [How to manage data transfer between iOS apps in Microsoft Intune](https://learn.microsoft.com/en-us/mem/intune/apps/data-transfer-between-apps-manage-ios)
{% endhint %}