PROBLEM:
I know this is an old post but here it is 2023 and still having same problem. I have had this problem a lot lately on Enterprise Solutions 23.0. Usually we get a QB or Win update and that messes up anyone trying to log in except for host computer. Sometimes running file doctor and database manager and restarting all PC's fixes it. Today for 3 hours i go around and around and none of the fixes work just like everyone above says....
FIX:
Finally I saw somewhere about the "CompanyFile.QBW.ND" file has the hosting information.... I opened that file in notepad, and instead of the host pc's local ip showing "ServerIp=192.168.1.X" it was showing 169.125.x.x or some address that is unknown to me. I changed that ip to the local host pc and that fixed the problem instantly. Not sure why we should have to edit ip's on our own but here it is. Hopefully this helps someone else down the road....
ProTip: if you don't know how to find IP's, on server PC hit WIN+R, type CMD. then type ipconfig /all and look for IPv4 address. Good luck!
