How to Fix the Unauthorized Error 401 While Office 365 Conversion

Users from across the world, access Office 365 to handle their emails for business purposes. Many users are performing the conversion from a file format to Office 365 to avail of advanced features. However, many experts recommend that users be cautious and consider a few essential factors to avoid facing any type of error while performing the conversion process to Office 365. This blog further reviews a reliable method on how to fix the unauthorized error 401 while performing Office 365 conversion.

A-List of Some Major Reasons Why the Error 401 Occurs

If a user is getting this error message displayed on their screen, 'The request failed. The remote server returned an error: (401) Unauthorized', then we have listed some of the common reasons why the error is occurring:

• When the User Principal Name is different from a user ID.
  If a user is accessing a different Office 365 account which is different from the User Principal Name, then it is most likely that the error will occur.


• When the password and username spelling is not correct,
  then there are chances that a 401 error will happen.


• When a user enables the 'Multi-Factor Authentication'
  for their respective Office 365 account..


• When the DNS of Microsoft is not registered with a user's domain of Office 365.

Discover Reliable Solutions on How to Fix the Unauthorized Error 401 While Office 365 Conversion

1. Users can update their respective Office 365 account administrator credentials.
2. If a user has opted for a complex username or password, then it is recommended to reset it.
3. A user should cautiously examine their Exchange Admin Center details.
4. A user can opt for a different Office 365 account for the conversion of data..
5. You can select the Global Administrator credentials of their respective account.

Select a Reliable Solution to Fix the Unauthorized Error 401 While Office 365 Conversion

After implementing the above-mentioned steps, if a user is still facing the error, then it is recommended to opt for a reliable and professional solution rather than using the manual method. KDETools Zimbra to Office 365 Migration tool is a one-stop solution for any user depending on their diverse requirements. This software is well-equipped with powerful features that will help a user to experience a smooth conversion process to Office 365 account without facing any errors.

• Install and run the KDETools Zimbra Converter tool on the system.
• Right-click on the 'Add' tab to select the items.
• Fill in the correct credentials of the account.
• 'Office 365 Group' tab will appear and will be selected by default. (To convert multiple mailbox items, the user needs to select the second tab.
• Double-click on the 'Add' tab.
• Go to the 'Set Filter' tab.
• Click on 'OK'.

This blog entails a detailed guide on how to fix the unauthorized error 401 while performing Office 365 conversion. We have compiled a list of some common reasons why the error 401 occurs and mentioned the manual as well as a professional solution to fix the issue.

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