How to Configure User Consent Settings
If you encounter the "Need admin approval" message, kindly request your organization's administrator or your IT admin to grant user access.
These are the steps that the organization's administrator should follow:
Sign in to your Office365 administrator account
Click Settings > Org Settings
In User consent to apps, ensure the checkbox is marked.
Click Save Changes
Alternatively, if you have administrative privileges or know the admin login details, you can select the option "Have an admin account? Sign in with that account" and check the consent box. This will allow all users to connect to Office 365. Please see the screenshots below ⬇️
To learn more about consent, view Microsoft's: