@Vishal vardhan, Thanks for posting in Q&A. From your description, I know you are activating Intune Administrator. But after researching, I didn't find the action in Intune. Could you let us know if you mean granting user with Intune administrator permission? If not, please get screen shot to let us better understand it. As a reminder, if any sensitive information in screen shot, please hide it.
https://learn.microsoft.com/en-us/mem/intune/fundamentals/users-add
Meanwhile, for the verification, are you meaning MFA? Besides password verification, did we configure Microsoft authenticator verification?
Please check the above information and if there's any update, feel free to let us know.
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