Microsoft 365 Fundamentals: MS-900
Azure Fundamentals: AZ-900 Certification
Azure Administrator: AZ-104 Certification
Windows Server 2016 Administration
Active Directory on Windows Server 2016
Mastering Group Policy on Windows Server 2016
PowerShell for Active Directory Administrators
Securing Windows Server 2016 
Hyper-V on Windows Server 2016 and Windows 10

PowerShell version 5.1 and 6: Step-by-Step

Azure Security Engineer: AZ-500 Certification

Windows Server 2019 Administration