Are you getting Quickbooks error H202 when switching to multi-user mode? When trying to switch to multi-user mode on one of your workstations, you are getting error H202. This program will not switch over to multi-user mode.
As a result, you can only get one person in a Quickbooks file at a time. Please download and run this Quickbooks network diagnostic tool on a computer that has your company files shared. Hopefully, that tool will be able to diagnose and tell you what exactly needs to be done to fix your issue.
If that tool does not help you then I have provided a troubleshooting link for a H202 error your’re receiving from quickbook support.