An error causes inaccessibility to services and data in the account AADSTS16000: User account '{EUII Hidden}' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application

You have to confirm if your are part of the tenant. If not you need to request an invite and redeem.

If you confirm you are part of tenant, to resolve the error, sign out from the active session and sign in with a new incognito window or any different browser.

See:

Error AADSTS50020 - User account from identity provider does not exist in tenant

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Regards,

Abiola

@Salman Abdul Rhman Sakr Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Adding more information to the above response!
I'm sorry to hear that you're experiencing this issue with your Azure account. The error message you're seeing indicates that your user account from the identity provider 'live.com' does not exist in the tenant 'Microsoft Services'. This typically happens when the account is not recognized as an external user in the tenant.

Here are a few steps you can try to resolve this issue:

1. Sign Out and Sign In Again: Sometimes, simply signing out and signing back in with the correct Azure Active Directory (AAD) user account can resolve the issue. Make sure you use the email address that is recognized by the tenant.
2. Add as an External User: If the account you are trying to use is not recognized by the tenant, you may need to add it as an external user. You can do this by:
   • Going to the Azure portal.
   • Navigating to the Azure Active Directory section.
   • Selecting "Users" and then "New guest user".
   • Entering the email address you want to add and following the prompts to complete the process.
3. Check Account Settings: Ensure that the email address you changed to (c**ners4@gmail.com) is correctly set up and verified in your Azure account settings.

Error AADSTS16000 is thrown when the user not found in the tenant used for authentication. In your case, this error usually occurs when you sign in to Azure Portal using your personal account which is not added as an external/guest user to an Azure AD tenant. Due to this, you by default get connected to the Microsoft Services tenant.

Since you are connected to the Microsoft Services tenant as a standard user with restricted access, you cannot perform actions such as creating new users, groups, enterprise applications, and so on. To perform administrative actions, you must have administrative access to the tenant.

For this purpose, you need to create your own tenant rather than using the Microsoft Services tenant. When you create a new tenant, you by default become the Global Administrator of the new tenant and have full access to all the options in that tenant.

To create a new tenant, open in-private/incognito browser window (just to avoid SSO), access https://azure.microsoft.com/en-us/free/ to create a free Azure account.

Once the new account is created, you should be able to see and switch to the new tenant by clicking on the settings icon as highlighted below:

In some cases, the user might already have an active session that uses a different personal account than the one that's intended to be used. Or they have a session that uses their organization account although they intended to use a personal guest account (or vice versa).

In that scenario, try signing in to the Azure Portal trough a tenant-specific URL using the following format:

https://portal.azure.com/<tenant domain name>

Eg.

https://portal.azure.com/constoso.onmicrosoft.com

Issue while logging in to Azure/Entra portal - AADSTS50020/AADSTS160021/AADSTS16000

Please let us know if you have any further queries. I’m happy to assist you further.    

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