The Reason Behind the QuickBooks Multi User Switching Error H202 Reason QuickBooks Error H202 typically occurs when QuickBooks Desktop is unable to communicate with the company file located on another computer. Here are five common reasons for QuickBooks error H202: Network Connection Issues: One of the most common causes of error H202 is network connectivity problems. This could include issues such as a weak or unstable network connection, firewall settings blocking QuickBooks communication, or incorrect network setup. Incorrect Hosting Configuration: QuickBooks Desktop should be properly configured for multi-user mode when accessing the company file over a network. If the hosting settings are incorrect or if multiple computers are trying to host the same company file simultaneously, it can lead to error H202. DNS Issues: Domain Name System (DNS) problems on either the server or workstation can prevent QuickBooks from resolving the IP address of the computer hosting the company file. This can result in error H202 when trying to access the file over the network. Blocked QuickBooks Services: Some antivirus or security software may block the QuickBooks services necessary for multi-user access, leading to error H202. It's important to ensure that QuickBooks services are allowed through any firewall or security software installed on the server or workstation. Damaged QuickBooks Installation: In some cases, the QuickBooks installation itself may be damaged or corrupted, leading to communication errors like H202. Reinstalling QuickBooks or performing repair steps on the existing installation may resolve this issue.