Return
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Title
Receiving 'Unauthorized' error with some files ingesting into O365 and causing migration to fail. -
Description
When using Migration Manager for PST Enterprise Edition (MMPST) to move the content of PST files into an Office 365 target you may encounter some PST files that fail to successfully ingest. In review of the reason why, you find that the failure occurred while the Ingest module was attempting to process the file and a "401" error code was the code provided for why. -
Cause
An excerpt of the worker log showing the resultant error can be seen below:EXCEPTION: Microsoft.Exchange.WebServices.Data.ServiceRequestException: The request failed. The remote server returned an error: (401) Unauthorized. ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized.This is caused by at least one ingestion account having inappropriate credentials, an expired password, or an alternate means to fail authentication. Ensuring account passwords do not expire, the accounts are accessible, and the proper credentials are provided to the Credential Editor will result in no future instances of this error. -
Resolution
Review of a given worker log can show the account which is failing. Using the example above you have to determine the Process and Thread IDs of the action being taken:2015-03-20 00:10:59Z|ERROR|P:1460|T:5|FolderCreator|Unable to create/retrieve folder [Archive Folders\Sent Items] in [ArchiveMsgFolderRoot] for [User@Domain.net]In this case these are 1460 and 5 respectively. Then following the ID pair up the log, you can find what ingestion account was used for this communication. Below is an excerpt showing mention of this log entry:2015-03-20 00:10:55Z|INFO|P:1460|T:5|WrappedServiceCredentialStorage|Using [pstfd_ingest-10@domain.net] as Service Ingest accountIn this case, attempting to access Office 365 using this account name and the same password supplied to MMPST will also fail. This is at least one instance of an ingest account failing authentication to the target. You may need to continue to review the instances of failures to ensure all the ingest accounts have been properly configured in MMPST and Office 365.