I am using QuickBooks Desktop Pro 2020 on two machines running Windows 10 Pro and having issues with multi-user mode. Computer 1 hosts and uses QuickBooks daily and has to run a routine that requires QuickBooks to go into Single user mode sometimes multiple times a day. When computer 1 switches to single user mode and then back to multi-user mode, computer 2 can no longer login to QuickBooks. The only way I can get multi user to work is for Computer 1 (Hosting Computer) to close QuickBooks, Computer 2 then logs into QuickBooks and switches from Single User to Multi-User. Then and only then can computer 1 and computer 2 be logged into the same company file simultaneously. Computer 1 cannot successfully switch the company file to multi-user, only computer 2. I have had countless setups before where the computer hosting the file was also running QuickBooks and never had this issue on older versions of QuickBooks.
I have completely disabled and uninstalled all firewalls, checked network settings, ran File Doctor which says it finds issues but the problem persists. I was able to move the file to host on another computer that does not run the QuickBooks desktop software and multi-user mode works fine this way, however this third computer is not a viable option as it is a laptop and leaves the office regularly. What else can I try to resolve this? Sorry to be long winded and thanks for your help in advance.
