We recently setup Azure AD for our domain. After adding our first Windows 10 client device successfully and then logging out, the option to sign on to a work account (Azure AD Domain) was added. I cannot logon, however.
I've tested several users that work on the local domain fine, and also appear fine under Azure AD online under Users. What steps could I have missed, or what settings could be necessary, that may not have been turned on or could otherwise be causing this issue?