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Apps on Azure Blog
5 MIN READ

Introducing the 'Session Affinity Proxy' setting in App Service Configuration.

Gonzalo_Murillo's avatar
Gonzalo_Murillo
Icon for Microsoft rankMicrosoft
Jan 22, 2025

Simplifying the configuration of an App Service behind an Azure reverse proxy (Azure Front Door or Application Gateway) without custom domains.

From our own metadata and experience at Microsoft, we know that a considerable number of our customers use App Service behind one of our reverse proxy solutions, such as Azure Application Gateway or ...
Updated Jan 24, 2025
Version 2.0
azure app configuration
azure app service
SAML_Rookie's avatar
SAML_Rookie
Copper Contributor
Jul 21, 2025

I have multiple app services running over a Web Application Gateway V2 without issue at the moment configured with SAML and everything works fine.

Until moving a Drupal site to App Service, I am now facing an issue where the client facing domain (ex. test.test.com) is called but the ACS for my SAML connection is expecting (appserviceenvironment) instead.  I think one issue of this is how Drupal SAMLAuth module handles the traffic, but I was hoping this setting would preserve the client facing domain.

Is there any further configuration that needs to be done? Adding X-forward headers? I'm at a loss right now and I have a support ticket in as well, but even support seems to say use Custom Domains, which doesnt work for me as multiple applications are used on a single domain using path based URIs.