Running a SBS 2012 Essentials server with 5 users, users are experiencing issues, one computer will not resolve names user has to browse the LAN using an ip address. When he tries to select the shared drive on the SBS 2012 server it cannot resolve but if he uses the SBS 2012 server Ip address it's fine. other users when they try to get to the share on the SBS 2012 server it takes along time. Also when printing sometimes it works sometimes it does not. I found this warning in event viewer DNS:
The DNS server is waiting for Active Directory Domain Services (AD DS) to signal that the initial synchronization of the directory has been completed. The DNS server service cannot start until the initial synchronization is complete because critical DNS data might not yet be replicated onto this domain controller. If events in the AD DS event log indicate that there is a problem with DNS name resolution, consider adding the IP address of another DNS server for this domain to the DNS server list in the Internet Protocol properties of this computer. This event will be logged every two minutes until AD DS has signaled that the initial synchronization has successfully completed.
I checked the router/firewall DNS and DHCP is turned off
SBS 2012 server is running DHCP and DNS for the LAN