Hello, @Iniobong Nkanga,
Welcome to the Microsoft Q&A platform!
Based on your description, I understand that You have trouble logging into Outlook and are prompted that your sign-in was successful but does not meet the criteria to access this resource. In order to better understand the problem, I would like to ask a few questions:
- How long has this problem been going on?
- Can you provide us with a screenshot of the error?
- Are users in your group experiencing the same problem?
You can try logging into OWA with the same account. If it does not work, the error may be caused by certain conditional access policies.
From the message you provide, it appears that your tenant admin has configured conditional access. Conditional Access is the protection of regulated content in a system by requiring certain criteria to be met before granting access to the content.
To solve your problem, I recommend that you verify that you are applying and meeting the conditional access policy. For more information on conditional access policies, please refer to this document: What is Conditional Access in Microsoft Entra ID? - Microsoft Entra ID | Microsoft Learn.
In this scenario, I will suggest you please contact your Microsoft 365 tenant admin to check if they have applied the policies.
Please feel free to contact me if you have any queries. If my reply is helpful to you, you can mark it as the answer so that other users can refer to it. Thank you for your support and understanding.
Best,
Alex Zhang