Onedrive won't display via mirroring

The school’s Intune administrator should first check whether OneDrive is covered by an iOS app-protection policy that blocks Screen capture, because that control explicitly blocks AirPlay mirroring and can produce this black-screen behavior.^1^

Confirm whether an Intune policy is responsible

On the affected iPad:

1. Open a school PDF in OneDrive.
2. Take a screenshot or start an on-device screen recording.
3. Compare the result with an unmanaged app, such as Safari displaying non-school content.

If OneDrive is black or displays a blocking alert while the unmanaged app captures normally, give those results to the school IT administrator. This points to managed-app screen-capture protection rather than a general AirPlay or projector fault. Intune’s setting covers:

• Screenshots and on-device recording
• Sharing through apps such as Teams or Zoom
• AirPlay mirroring
• QuickTime mirroring or recording on a Mac

The documented default is Allow, but an assigned policy can set it to Block.^1^

Administrator action

An Intune administrator should:

1. Open the Microsoft Intune admin center.
2. Go to Apps → Protection and select the iOS/iPadOS app-protection policy assigned to the affected teachers.
3. Open Properties → Data protection.
4. Find Screen capture.
5. If school policy permits classroom projection, change it from Block to Allow.
6. Save the policy, let the iPad receive the updated policy, and then retest OneDrive mirroring.

Microsoft also documents a transition in which updated Intune-protected apps could block capture when Send Org data to other apps was set to anything other than All apps. For environments still using that behavior, the administrator should review the dedicated screen-capture setting and any existing app-configuration override rather than weakening all organizational data-transfer restrictions.^2^

Do not attempt to bypass this policy by moving school files into an unmanaged app without approval; the restriction may be intentional.

If screenshots work but only mirroring fails

That result makes the Intune screen-capture policy less likely. Test these branches:

• Network isolation: Have IT test the same managed iPad on an approved network that does not pass through Zscaler. Microsoft notes that firewalls and VPN configurations can prevent OneDrive connectivity, but there is no specific evidence here establishing Zscaler as the cause of this mirroring symptom.^3^
• App fault: In OneDrive, select Profile → Settings → Account → school account → Reset, then test again. If it remains broken, Microsoft’s next supported step is to uninstall and reinstall OneDrive.^4^
• Escalation: Because this affects multiple teachers and a work/school account, the school helpdesk should collect the iPadOS version, OneDrive version, policy assignment, screenshot test result, and whether the issue reproduces outside the filtered network. Microsoft directs work/school users to their organization’s IT administrator, who can escalate through Microsoft 365 business support.^4^

References

1. iOS App Protection Policy Settings
2. In development for Microsoft Intune
3. Fixes or workarounds for recent issues in OneDrive
4. Troubleshoot OneDrive for iOS app problems | Microsoft Support