If you have deployed multiple domain controllers (highly recommended). Next is to make sure you domain controller replication is working correctly. You can use Microsoft powershell commands (Repadmin) to check. Or alternatively checkout our Active Directory Reporting Tool
Problems with replication can cause authentication failures and issues accessing network resources (files, printers, applications, servers, etc).
Repadmin is an Active Directory diagnostic tool to check for replication of domain controllers, replication topology, as seen from the perspective of each domain controller. In addition, you can use Repadmin.exe to manually create the replication topology, to force replication events between domain controllers, and to view both the replication metadata and up-to-dateness vectors (UTDVECs). You can also use Repadmin.exe to monitor the relative health of an Active Directory Domain Services (AD DS) forest.
Run the following command to list all available repadmin commands: