I recently just switched a 15 person company from a workgroup setting to a domain and am having some issues. There is one server that is the DC, DNS, does file shares. The server has 16gb RAM and a great processor, and 8 15k drives in RAID 10, so it should have tons of power left over. The fortinet firewall is doing dhcp.
Users mapped drives will disconnect and will not reconnect or find the server again until they restart their computer. If they can see the drives buy havent accessed them in 10-15 minutes and try to open them it takes 30+ seconds to load. Everyone is gigabit ethernet.
Could this be a DNS problem?