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Get to Know About QuickBooks Error 401 and Fix it!

QuickBooks API HTTP error 401

Are you struggling to find the right solutions for the QuickBooks Error 401? Do not worry, we are here to assist you in this. Error 401 is an authorization error that appears while accessing the QB Desktop and the Online version. However, the error appears slightly different in QBO and in QB Desktop. It appears as QuickBooks API HTTP error 401 appears in QBO while QuickBooks Unauthorized Error Code 401. In this blog will, however, we will discuss the error in detail and will provide you with proven solutions to troubleshoot it in QB Desktop and QB Online, so go through the blog till the end. In the modern digital landscape, QR codes have become an integral part of business transactions and communication, and understanding how they interface with QuickBooks can be crucial in addressing Error 401 effectively.

What is QuickBooks Error 401?

QuickBooks error code 401 is an authentication error that appears when you have an unauthorized request in QuickBooks Desktop. It affects both the desktop and the online versions of the application but in a different manner. It signifies that the authentication process has failed and prevents the application from establishing a secure connection. The error message for QuickBooks Unauthorized Error Code 401 says,

“The Remote Server Returned an Error: (401) Unauthorised.
Request is Unauthorised.
Do you want to login again.”
Error: Request Failed with Status Code 401

QuickBooks Error Code 401

When Do You Get Error 401 in QuickBooks Desktop?

You can get the QuickBooks unauthorised error 401 while you do things like:

  • When you sign in to your company file or accountant toolbox.
  • You are registering during QuickBooks installation.
  • You are sending an invoice with QuickBooks Payments.

Simple Solutions to Resolve QuickBooks Error Code 401

An outdated application is one major reason why QuickBooks error 401 occurs in the desktop variant of the application. One simple solution is to update the QuickBooks Application. Follow these steps in order to do so:

  • Tap on No in the error message window to close it. 
  • Now close your company file and then close QuickBooks. 
  • Now go to the Windows Start menu and search QuickBooks desktop.
  • Right-click on its icon and select Run as administrator
  • In the no company window, tap on the Help menu and choose Update QuickBooks Desktop.

Steps to Update QuickBooks Application.

  • Go to the Options tab and choose Mark All. Then tap on save.
  • Go to the Update Now tab and tick mark the Reset Update box.
  • Click on the Get Updates button.
  • Once the update finishes, reopen the QuickBooks desktop and select Yes to install updates. 

QuickBooks API HTTP Error 401 in QuickBooks Online

In QuickBooks Online, users are required to complete the OAuth signature process in the Authorization header and get access tokens. OAuth protocol helps to set up authentication and authorization for your application. Any Failure can lead to QuickBooks API HTTP Error 401. It means that the final Inventory cannot access the QBO file. 

Also See : Resolve QuickBooks Error 40001- Unable To Activate Direct Deposit

Causes for Error message “QuickBooks API HTTP error 401”?

You might face a login issue when file inventory fails to access the QBO file. There are several reasons for the error message “QuickBooks API HTTP error 401”. Let’s look at the possible reasons in detail:

Expired Access Tokens: The access tokens have a validity of 180 days; once that validity is crossed, you are required to complete the OAuth signature process again.

Wrong Email ID: Many users have faced QuickBooks Error Code 401 due to the wrong Email ID entered by them or users other than the master admin trying to log in for the realm.

Changes made by Admin: This error can occur if the Admin disconnects the realm or company manually and then someone tries to access the file. Disconnecting the file manually invalidates the access tokens irrespective of their expiration date.

Master Admin is deleted from QBO: Master admin is the original user who is supposed to authorize the connections. The error will arise if that user is deleted from your QBO file.

Simple Steps to Fix QuickBooks API HTTP error 401

There are 2 different options to fix QuickBooks Error 401. One is to re-login into your company file, and the other is to remove the integration and then add it back. Let’s discuss the solution in detail:

If you are already logged in to your company file but cannot use certain features, try logging out of your company file, closing your web browser, restarting your system, and then logging in to your company file again. You can skip the first step if you are not logged in.

First, you need to re-authorise the connection between Finale Inventory and your QBO company file. Follow these steps to remove and then add back integration:

  • Go to QBO settings and Tap on Admin then click on Integration.
  • Now, select QuickBooks Online under accounting.
  • Tap on Disconnect.
  • Click on confirm to disconnect the integration.

the remote server returned an error 401 unauthorised QuickBooks

  • Go back to Feature Add-ons and choose Manage Add-ons.
  • Search QuickBooks Online Integration and choose Install. 
  • Click on Connect to QuickBooks. Intuit sign-in page displays up. 
  • Put in login credentials. In case you are operating multiple companies, you need to choose which one you want to link.
  • If a message asks, select Authorize. 
  • The “You are now connected” message displays, and the preference window will open up.

Instant Support!

So, now you can easily get rid of QuickBooks Error 401. We discussed the troubleshooting method for both QBD as well as QBO. If you are stuck somewhere and find it difficult to fix the issue, we would suggest you give us a call on QuickBooks Data Service Solutions Helpline Number +1-(855)-955-1942.

Question 1: What Does the QuickBooks API HTTP Error Mean?

Ans: QuickBooks API HTTP error means that the final Inventory cannot access the QB Online file.

Question 2: What are the alternative methods to fix Error Code 401 in QuickBooks Desktop?

Ans: To fix the QuickBooks desktop error 401, try to update your application and then run it as an administrator while accessing it.

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Oscar Joe Editor
Oscar Joe is a Certified Accountant with Expertise in QuickBooks, Sage and Quicken Accounting Software. Joe has been working with Data Service Solutions for the last 3 years as a QuickBooks Expert and is Helping Accounting software users with their day to day accounting tasks and issues.
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