@Mohanlal,Thanks for posting in Q&A.
To clarify your issue, please check the following.
1.Please check whether you have assigned user's related license.
2.Please check if there exist some error message in C:\ProgramData\Microsoft\IntuneManagementExtension\Logs
3.Please check the incoming folder if it has any files? C:\Program Files (x86)\Microsoft Intune Management Extension\Content\Incoming
4.This issue may be caused by lost Intune certificates (due to feature upgrades https://techcommunity.microsoft.com/t5/intune-customer-success/intune-mdm-enrollment-certificate-not-present-after-updating-to/ba-p/1950471).
5.Try to log out from company portal and restart the device and then login company portal to check whether the issue can be fixed.
6.Please confirm us what kind of device enrollment have you use?
Please check above information, if there is any update, feel free to let me know.
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