Dear Azure experts,
Our company implemented(subscribed) Azure AD recently and we want employees to login with AzureAD account to their Windows.
The device is Azure joined.

after joining, I tried to login with AAD account but it says password incorrect. I tried username : Domain\ID, Domain\Email, Email, ID, and correct password. it seems like I still can't connect Azure AD server from end devices.
I found that we didn't enable Intune(MDM) in Azure portal. should I enable it? what would be the next step then? once I enable Intune, are employees able to login with organization account in Windows PC?
Thank you for your help!