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bcaulder8's avatar
bcaulder8
Copper Contributor
Oct 15, 2025

Edge Mobile prompting users to Allow opening app using Custom URI Scheme

Somewhat recently, perhaps with release of IOS 26, Microsoft Edge began prompting users to "Allow" or "Don't allow" a site to open another application when using a Custom URI Scheme. This causes an unnecessary step in our user's authentication process especially when Conditional Access policies are enabled as Edge must be used to pass the CA conditions. This occurs even when the custom-intunemam:// scheme is used to open the Intune enabled application from Edge.

 

I am wondering if there is an Edge Mobile - Intune configuration/setting that we could configure to bypass the prompt.

 

Thanks!

Conditional Access
Edge Mobile
Intune
Mobile Application Management (MAM)

2 Replies

  • AladinH's avatar
    AladinH
    Copper Contributor
    Oct 15, 2025

    Hi bcaulder8​,

    This is expected on iOS 16+ for security reasons. To bypass the Edge prompt when opening a custom URI scheme, you can configure Intune as follows:

    - App Protection Policy - Add the target apps as exceptions under Data Transfer Settings.

    - Edge App Configuration - Use the key com.microsoft.intune.mam.managedbrowser.URLAllowlistand whitelist your URI scheme.

    - Conditional Access - Ensure Edge is included as a compliant app so CA policies don’t block the flow.

    Once configured, users should be able to open the app without seeing the prompt.

    • bcaulder8's avatar
      bcaulder8
      Copper Contributor
      Oct 16, 2025

      Hi AladinH​ ,

      Our application is enrolled in Intune and included (not excluded) in the App Protection Policy.  Our application also supports Conditional Access and it is applied on both Edge and our application (we support the App Protection Required grant).

      The site uses our "custom://" Custom URI to pass the information back and we don't add that Custom URL as an exception because we want Edge to add the "-intunemam" and pass the information back in the Intune "container". This is now causing a prompt though where it didn't prior.

       

      Question about the Edge App Configuration setting: Are their other implications of using the URLAllowList? Wouldn't clients be required to add all possible URLs or does a Wildcard work.

       

      This started happening recently and I am wondering if it was an update of Edge Mobile that caused the prompt now vs. iOS (if this started happening in iOS 16+).

       

      Thanks

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