Hi @danipi
Could you describe more details about this issue?
What is the meaning of old number?
According to your error message, it seems the affected users are blocking 3rd party cookies in the browser.
You can try to enable cookies for the selected website. Marilee provided a good direction for you.
For more details about this issue resolution, you can try to refer to:
https://www.koskila.net/resolving-error-aadsts90056/
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