This error code has been seen when QuickBooks is using multi-user mode without hosting that mode we receive this error code. To fix QuickBooks pro error code 6123 0 you can try to exit from tray icons and then again try to reopen it may be the problem is solved and there is no need to troubleshoot the error but if the error continues to exist you can read steps mentioned below to fix error code.
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STEPS TO FIX QUICKBOOKS ERROR 6123 0:
Method1: Change multiuser setting.
Step1: Restart the system and open QuickBooks application.
Step2: Click on file and select utilities, after that click on stop hosting multi-user access.
Step3: Click on file and select switch to multi user mode.
Step4: If not found click on file then select utilities, after that click on host multi user access.
Method2: If Antivirus services installed on your computer.
Step1: Open Antivirus security center.
Step2: Select Privacy services located on the left side of Antivirus panel.
Step3: Select configuration and click on options tab.
Step4: Open the Block info tab, and uncheck block web bugs option in the tab.
Step5: Close Antivirus and open QuickBooks in multi-user environment.
Call QuickBooks Support Number 1-844-706-6636 to Fix Multi-user Mode Error 6123 0
If after following all the steps given to fix QuickBooks restore error 6123 0 you can get in touch with an expert. Call now to get connected with QuickBooks professionals you can contact QuickBooks pro support number and get online help to fix Multi-user mode problem with QuickBooks. Best team of certified tech professionals is working here to fix QuickBooks pro 2017 error 6123 0 with right solutions by tech experts.