Hi @mwf ,
Thanks for reaching out.
Switching an app registration from single-tenant to multi-tenant can sometimes fail due to Application ID URI name collisions.
IdentifierUris is the user-defined URI(s) that uniquely identify a web app within its Microsoft Entra tenant or verified customer owned domain.
For a single-tenant application, the App ID URI need only be unique within that tenant. For a multi-tenant application, it must be globally unique so Microsoft Entra ID can find the app across all tenants.
For example, if the name of your tenant is contoso.onmicrosoft.com, then https://contoso.onmicrosoft.com/myapp
is a valid App ID URI. If your tenant has a verified domain of contoso.com, then a valid App ID URI would also be https://contoso.com/myapp
. If the App ID URI doesn't follow the second pattern, https://contoso.com/myapp
, converting the app registration to multi-tenant fails.
The recommendation in this scenario is to register new application as Accounts in any organizational directory (Any Microsoft Entra directory - Multitenant).
Hope this will help.
Thanks,
Shweta
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