Azur AD - Multi tenancy application available to other organizations - azure

I've created a multi tenancy application so I could use the SSO options it gives me.
When trying to sign in with a user outside the domain of the app I get the following error:
AADSTS700016: Application with identifier <MY_APP_NAME> was not found in the directory <I_GUESS_THE_USERS_DIRECTORY_ID?>. This can happen if the application has not been installed by the administrator of the tenant or consented to by any user in the tenant. You may have sent your authentication request to the wrong tenant.
According to this question it's suppose to work without me having to do anything.
But, is it? what me or the organization should do in order to complete the process?

You need to also provision a service principal of your multi-tenant app in the target tenant. A detailed guide is available here.

There are four simple steps to convert your application into an Azure Ad Multi-tenant app:
1.Update your application registration to be multi-tenant
2.Update your code to send requests to the /common endpoint
3.Update your code to handle multiple issuer values
4.Understand user and admin consent and make appropriate code changes
Reference:
How to: Sign in any Azure Active Directory user using the multi-tenant application pattern
Build a multi-tenant daemon with the Microsoft identity platform endpoint

So in the scenario like above is it not required to "Register the Application all of the Active Directories" from where the Users from different tenant may login to the Application ?
If not required to register what is the work around?

Related

How do I configure Azure SSO between two Azure AD Instances?

I am very new to SSO and am having trouble enabling cross company SSO. I work on a React SPA and used the MSAL React Library to implement SSO for our application. I created a non-gallery Enterprise Application in Azure, and used that subscription information to validate users on the application during login. This is all working as expected.
After providing our SAML SSO configuration to companyB, the user at companyB cannot sign on and is getting the following error...
"Selected user account does not exist in tenant 'XYZ' and cannot access the application '123-456-789' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account."
To me, that means I need to manually add the user who is attempting to log in, but that would negate the usefulness of integrating the two Azure ADs. I've provided all of my SAML configuration to companyB, and still no luck. What could I be missing?
In order to create the link between the two Azure ADs, the user just needs to create a non gallery application with SAML SSO enabled and the SAML config, right? Any insight into this issue would be greatly appreciated!
I realized my code was configured to only work for one tenant, pointing to the common login endpoint solved this issue.

Why is my Azure application asking for admin consetment although i do not request for admin scopes?

I am developing a web application that allow users from any azure organization to give my application reading rights on their OneDrive using windows Graph-Api (scope: File.Read.All)
I registered a multi-tenants application in the azure portal and i configured the application like it is explained in the documentation
I need to Allow a user from other azure organisations to make a consentment for my application to read files content, but in my case i get a "Need admin aproval" after sending Authentication Code URL (tested with a user from another azure organization)
AuthenticationCode:https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=XXX&response_type=code&redirect_uri=YYY&scope=user.read files.read.all offline_access&state=ZZZ
What a user get after authetification to his Office-365 account
I know that there is other applications who do not have this issue, for exemple the application app.diagrams.net need only user consentment and not admin consentment even if it ask for read write scopes
diagrams.net AuthenticationCode:https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=b5ff67d6-3155-4fca-965a-59a3655c4476&response_type=code&redirect_uri=https%3A%2F%2Fapp.diagrams.net%2Fmicrosoft&scope=user.read files.readwrite.all offline_access&state=cId%3Db5ff67d6-3155-4fca-965a-59a3655c4476
What a user get with diagram application
This is not because of any particular scope. The answer to your question is discussed under "application provisioning" in Azure AD (AAD) terms. Put simply, an AAD application needs to be "provisioned" into an AAD tenant, and a tenant admin can choose whether users can initiate this by themselves or not. Here, it seems this is not allowed.
In more detail, when you create an AAD application, you create 2 objects: a representation of the application, and a "Service Principal" that handles access to that application. When you offer your AAD app to other tenants/organizations, they need their own service principal object to be able to access your application, and this happens through admin consent i.e. provisioning.
In general, there are 2 articles that you should take a look:
How and why applications are added to Azure AD
How to: Sign in any Azure Active Directory user using the multi-tenant application pattern
And these code samples should clarify the process:
Developing a Multi-tenant (SaaS) application with the Microsoft Identity Platform
Protect a multi-tenant SaaS web application that calls Microsoft Graph using Azure AD & OpenID Connect
EDIT: Correction: tenant admins can choose or not whether users are allowed to initiate app provisioning. Credits: #jasonJohnston.

Multi tenant azure app not visible for other tenants

Summary: How do I make a multi tenant app available to other Azure AD tenants?
Details:
I am writing a C# ASP.NET library using which I want to create subscriptions and register for change notifications.
I am using Microsoft Graph API v1.0 for this operation.
I followed this documentation to obtain the access token for a service account.
The first step listed in the documentation requires us to register the app on Azure AD Portal
Since I am building this app for multiple customers, I want this to be a multi tenant app. I followed this reference to register a multi tenant application, but I have a query as to how to make this app discover-able by other tenants ?
Do I need to publish it to be able to achieve this? If yes, can anyone please direct me towards any article which tells how to do that ?
Do I need to publish it to be able to achieve this?
No, you don't. For a multi-tenant application, the initial registration for the application lives in the Azure AD tenant used by the developer. When a user from a different tenant signs in to the application for the first time, Azure AD asks them to consent to the permissions requested by the application. If they consent, then a representation of the application called a service principal is created in the user’s tenant.
Do you mean under Enterprise applications blade of any tenant or the
one where it was created ?
It will exist in any tenant once a user from that tenant signs in to the application.

How Do I register an application from an external Azure AD tenant?

I have created a Web application in my local Azure AD which I can successfully use to authenticate members of my AD tenant with (using oAuth2 flow). Now I need to extend my supported scenarios to allow a global admin from an external Azure AD tenant to sign-up their company to use this application as well.
Based on the Microsoft Docs this scenario, Multi-Tenant, is supported...
Authentication Scenarios for Azure AD
Multi-Tenant: If you are building an application that can be used by users outside your organization, it must be registered in your company’s directory, but also must be registered in each organization’s directory that will be using the application. To make your application available in their directory, you can include a sign-up process for your customers that enables them to consent to your application. When they sign up for your application, they will be presented with a dialog that shows the permissions the application requires, and then the option to consent. Depending on the required permissions, an administrator in the other organization may be required to give consent. When the user or administrator consents, the application is registered in their directory. For more information, see Integrating Applications with Azure Active Directory.
From my reading it appears that at some point a global admin for the foreign tenant should be presented with a URL which they can follow ( login.microsoftonline.com/common/??? ) which will somehow cause the external application to precipitate like a morning dew into their Azure AD. However, if this is the correct approach I would appreciate a tokenized example of how one correctly builds the login URL for a multi-tenant external Azure AD application which a group admin can follow to allow access in their AzureAD.
Ok, through trial and failure I have found the solution. The group admin for the remote tenant needs to be provided with the following URL which will allow them to register your Azure AD application as an Enterprise Application in their tenant.
https://login.microsoftonline.com/{remoteTenantUrl.com}/adminconsent?client_id={YourAppsClientID}&redirect_uri={YourAppsCallbackPage}

How to configure consenting for an Azure app (AADSTS65005 error)

We have an Azure resource app whose APIs we want to expose for access by a client app on Azure. The two apps are on different tenants. The users accessing the APIs (Office 365 account holders) are on different tenants.
The whole set up works when we manually provision a service principal on the tenant that is trying to authenticate from the client app against the resource app. By that I mean they are able to log in using their Office 365 account and are shown the consent screen.
If we do not provision a service principal on the AAD tenant of the user trying to authenticate, we get this error:
AADSTS65005 - The app needs access to a service <service> that your
organization org.onmicrosoft.com has not subscribed to or enabled. Contact
your IT Admin to review the configuration of your service subscriptions.
It is not feasible for us to provision a service principal on every tenant that is accessing our app (resource app). Is there something we are missing? Are we using the right flow?
You can find help for your scenario here: https://learn.microsoft.com/en-us/azure/active-directory/develop/active-directory-devhowto-multi-tenant-overview#understanding-user-and-admin-consent. (Scroll down to Multiple tiers in multiple tenants)
In the case of an API built by an
organization other than Microsoft, the developer of the API needs to
provide a way for their customers to consent the application into
their customers' tenants.
The recommended design is for the 3rd party
developer to build the API such that it can also function as a web
client to implement sign-up:
Follow the earlier sections to ensure
the API implements the multi-tenant application registration/code
requirements
In addition to exposing the API's scopes/roles, ensure
the registration includes the "Sign in and read user profile" Azure AD
permission (provided by default)
Implement a sign-in/sign-up page in
the web client, following the admin consent guidance discussed earlier
Once the user consents to the application, the service principal and
consent delegation links are created in their tenant, and the native
application can get tokens for the API
Basically, all of the parts that your app needs must be present as service principals in the customer's tenant. This is a requirement of AAD.
The only way for that to happen is for an admin to go through consent for the API and app separately, since they are registered in different tenants.
If they were registered in the same tenant, you could use the knownClientApplications property in the manifest to allow consenting to both at the same time.
In my case, I am exposing my own API and trying to access this API from my other Application (Client Credentials mode), I removed the default permission on both of the app(consuming app and api app) - "Azure Active Directory Graph-> User. Read" since I thought I don't need that but that caused this problem "The app needs access to a service .... that your organization has not subscribed to or enabled. Contact your IT Admin to review the configuration of your service+subscriptions.
I got the clue from the answer of #juunas - point 2. Thx Juunas

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