I run QB Desktop Enterprise 2023. In the last 2 or 3 weeks I have run into a problem with multi-user mode. My workstation and the server runs on Windows 11. My AP's workstation is Windows 10. Whenever  AP gets on QB it automatically puts her in single user mode. If she tries to change to multi-user mode she gets error H202. I have no problem switching from single user mode to multi-user mode on my workstation or the server. When AP is working, we both cannot be on QB.

I have gone through all the suggestions on https://quickbooks.intuit.com/learn-support/en-us/help-article/multi-user-mode/fix-error-h202-h505/L...

My IT person has checked everything she could think to try.

Last Saturday, I contacted QB support and we decided to remove QB from the AP's workstation and install it again. I asked if the 2 different Windows would make a difference and she said no. QB support said she would call me Tuesday morning to follow-up, but unfortunately that did not happen. Once I installed QB again on my AP's workstation, I logged into QB. It works fine except if I try to change to multi-user mode. Then I get error H202.

My IT person brought another computer that runs Windows 10 so I could try installing QB on it. I went through all the steps and could use QB until I tried to change to multi-user mode and the Error H202 popped up. I'm stumped. Windows 11 did an update recently that messed up my printing with QB. Support had me run a QB update and it took care of it. I wonder if that update messed up the multi-user mode for us.

Any suggestions? Has anyone else run into this problem?