Microsoft Entra Application Proxy (Azure AD Application Proxy) randomly deletes characters and corrupts web page when viewed through proxy

Zieminek, Tara 0 Reputation points

We are encountering an issue that seems similar to this page with Microsoft Entra Application Proxy (a.k.a. Azure AD Application Proxy). When accessing a web page through the proxy, it appears to randomly delete characters, thus corrupting the web page. Sometimes it deletes a space, so it's not noticeable to the end user. Sometimes it deletes part of a tag which may obviously change the appearance and functionality of the web page. Sometimes it deletes another important character that breaks the webpage functionality (even if the appearance remains ok).

We aren't able to turn off URL translation to resolve the issue.

There's a similar-sounding issue that was patched for IIS URL rewrite. Is there any chance that a similar fix could be applied by Microsoft Developers to the Microsoft Entra Application Proxy / Azure AD Application Proxy?

Microsoft Entra
Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. JamesTran-MSFT 34,226 Reputation points Microsoft Employee

    @Zieminek, Tara

    Thank you for such a detailed post!

    I reached out to our Azure AD App Proxy team with your issue details, and I also noticed that you mentioned - you aren't able to turn off link translation to resolve your issue. However, as of right now, the recommended way that may resolve your issue would be to disable link translation.

    The App Proxy team also recommended opening a support request so they can work with you to gather more data and logs to better investigate your issue.

    • If you'd like to work closer with our support team on this, please let me know. I'd be happy to enable a one-time free technical support request for your subscription to get this issue resolved.

    Note: If you're a CSP Partner, you won't be able to open a support request directly – only the CSP partner has this ability.

    Additional Links:

    I hope this helps!

    If you have any other questions, please let me know. Thank you for your time and patience throughout this issue.

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