Hello @Furkan Ucar
Thank you for reaching out. I would like to explain you following details:
- Details about Homepage URL on Enterprise Application blade:
- If this is a custom-developed application, HomepageURL is the URL that a user can use to sign in to the application. If this is a pre-integrated application from the Azure AD Gallery, this is the URL where you can go to learn more about the application or its vendor.
- The homepage URL can't be edited within enterprise applications. The homepage URL must be edited on the application object.
- This has been documented on following documentation as well: Properties of an enterprise application
- You can edit the Homepage URL on Application object specific to your tenant from App Registration's blade. When you change the Homepage URL from Application Object on App Registration's blade following changes happen:
- App Object specific to your tenant gets updated with new URL, however the Enterprise App will always reflect the default URL published by vendor.
- You can refer following screenshot from my test tenant:
- When you perform any changes Homepage URL on the App Registration blade it updates Sign-in URL for your tenant on the App Manifest.
To summarize, the Homepage URL would never get updated on Azure AD Enterprise Application blade and would only get updated Application object specific to your tenant which can be verified using the App Manifest.
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