Here is the infrastructure: a fully patched Windows Server 2008 R2 domain controller (virtual machine on ESXi hypervisor) running a single forest and a single domain, a fully patched Windows Server 2008 R2 file server (also a virtual machine on the same
ESXi hypervisor), a Kyocera copier configured to scan to PDF and save the file to a share on file server. Both servers have Bitdefender Endpoint Security Tools installed (anti-virus component only).
After some time (seemingly random), the copier is no longer able to save a file to the share on the file server. Running nltest /trusted_domains on the file server returns no logon servers available to process the request. Rebooting the domain controller
clears the issue. After some time, the issue reappears. When the issue happens, no other file access seems to be affected, nor is logging on to a domain computer. This has been going on for the past 8 months. Enabled netlogon debugging and the latest log file
is available
here. We enabled "Always wait for the network at computer startup and logon" on both servers. We confirmed that the servers are not connected to a switch with STP enabled. We confirmed that both servers have the latest available drivers for the
NIC cards. We confirmed all proper DNS records are accurate and in place. We confirmed the time of the 2 servers and the copier is within the 5 minute delta. The latest test we did was to untick "Allow the computer to turn off this device to save power"
on the NIC cards in Device Management.
Any direction or input is much appreciated.