The QuickBooks users encounter many problems, such as H202, H505, or H303, when the important services for QuickBooks Multi-User, such as QBDBMgrn or QBCFMonitorservice, are not working. The QuickBooks multi-user mode could cease working or crash due to these problems. Problems with multi-user mode in QuickBooks desktop need to be resolved at the earliest to cause any further damage.
However, the procedure will become simpler for you, if you implement the guidelines in this post. Just be certain to read the article through to the end.