@Raman Katoch, Thanks for posting in Q&A. Since the devices are hybrid Azure AD Joined, the machine would need to be direct line of sight or to be able to communicate to a DC to authenticate the user when the user tries to login. For your issue, this needs to contact both Azure Active Directory and Active Directory support to analyze logs to look into the issue. I suggest open case to troubleshoot.
Azure AD support:
https://learn.microsoft.com/en-us/azure/active-directory/fundamentals/how-to-get-support
Thanks for your understanding.
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