I suspect Windows Firewall is blocking QuickBooks because my workstations can't connect to the company file in multi-user mode.
Everything was working fine until recently, and now QuickBooks either can't find the company file or switches to single-user mode. The network itself seems to be working, so I'm wondering if Windows Firewall or another security setting is preventing communication.
Has anyone dealt with this issue before?
What are the best ways to confirm whether Windows Firewall is causing the problem? Should I check firewall exceptions, required QuickBooks ports, or something else first?
I'd appreciate any troubleshooting tips that helped restore multi-user access without compromising network security.
