Are you frustrated with the frequent occurrence of the error code 401 in QuickBooks and are unable to fix it? You need not be annoyed, though, as this section gives you a thorough understanding of the factors that contribute to the error, as well as the various steps to fix QuickBooks error code 401. 

The warning message "The remote server returned an error:  401 unauthorized" appears alongside this error. It is advisable to read this article through to the end to learn about the reasons and various solutions for getting rid of this error.