I am currently using QuickBooks Enterprise 21 hosted on Windows Server 2012 using multi user mode.
Slowness occurs while on ethernet LAN, WIFI, and VPN. It does not discriminate.
I notice that it is ridiculously slow later in the day when multiple people are using it. I have had this issue before at another company and I don't remember how we fixed it. I also have a customer of mine complaining about the same thing so I can see that this is a usual problem with QuickBooks. We are considering going to Oracle's Netsuite for our company.
Does anyone know why we are having this slow performance issue?