QuickBooks crashing when switching to multi-user mode is a common issue often caused by network problems, corrupted installation files, or incorrect hosting settings. To resolve this, ensure the QuickBooks Database Server Manager is correctly installed and running on the server. Verify that all computers are on the same network and the hosting settings are configured correctly. Additionally, check for any software updates and install them. Running the QuickBooks File Doctor tool can also help id... moreQuickBooks crashing when switching to multi-user mode is a common issue often caused by network problems, corrupted installation files, or incorrect hosting settings. To resolve this, ensure the QuickBooks Database Server Manager is correctly installed and running on the server. Verify that all computers are on the same network and the hosting settings are configured correctly. Additionally, check for any software updates and install them. Running the QuickBooks File Doctor tool can also help identify and fix related issues, ensuring smoother operation in multi-user mode.