But if you still are facing the same error due to UPN settings and there is no manual method to solve the problem, then use a professional tool which can bypass all the technicalities and perform the migration on your terms. Read Also: Factors to be Considered Before Choosing an Office 365 Migration Tool Professional SolutionĪfter making all the appropriate changes in the Office 365 account, the error should be removed, and the migration should also be smooth.
Choose a different Office 365 account for the migration.Assign the Global Administrator credentials to the Office 365 account.If the Password of the Administrator account is too complicated, then reset it.Try to check complete detail of the batch migration and edit the information. Edit the Migration Endpoint in the Exchange Admin Center.If you are facing this error, then you may try to use the following solutions to rectify the problem: Then the error may occur, because the domain of the Office 365 may not be registered with the Microsoft DNS. Many times, the user creates an Office 365 account and try to start the migration instantly. The domain of Office 365 is not registered with the DNS of the Microsoft.The spelling of the username and password of the Office 365 is not correct. The Username and Password have incorrect spelling.If the Office 365 has multi-factor authentication enabled for the account, this it is not easy for a manual method to access the mailbox easily. MFA (Multi-Factor Authentication) is enabled for Office 365.If the Office 365 account which you are using is different from the UPN from the Active Directory, then you will have to face the error. The user ID is different than the UPN (User Principal Name).If you are facing this kind of error, then there may be multiple reasons behind this issue The remote server returned an error: (401) Unauthorized. In this article, we will go through one significant error which does not even let the migration started. However, there are multiple precautions which you should take care while migrating the data otherwise, there can be some unwanted errors. It has become a dominant player in the cloud business and businesses are migrating their data at a rapid speed. Office 365 is the favorite destination of the majority of business organizations when they think about a suitable cloud platform.
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