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Office 365 Import Failed- Multiple Tricks to Fix Most Common Errors

Published By Mohit Jha
Tej Pratap Shukla
Approved By Tej Pratap Shukla
Published On March 15th, 2024
Reading Time 8 Minutes Reading

Importing PST to Office 365 is a bit challenging and a crucial task. Completing the entire process without any error or failure happens in rare cases. There are several silly mistakes that users make during the import process. This will later result in Office 365 Import Failed error. In this type of migration if you get stuck with an unknown error, then from this guide here you will get all the answers.

Table of Contents:

Common Queries Asked by Users

Now, to understand the problems or errors faced during PST import process, consider some of the queries asked by the users:

User Query 1- A few hours ago, we were importing PST files to Office 365 with the help of AzCopy Tool. And, suddenly, it displays the status that Office 365 import failed. The details it displayed are that the process is 70% complete. Now, I am looking for a solution that lets me resume the job from where it was left off or do I have to restart the job? Some of the sites over the internet suggested to the delete the entire online archive process and starting importing all over again. I do not know why this Office 365 PST import failed as previously I have imported many times without any failure.

User Query 2- When I was uploading multiple PST files in batches, the upload worked perfectly during the upload process for the first 3 batches. But as I initiated a new job and created a new sas-url to replace the URLs in the copy job, it displayed a 403 error message: error message I am confused now and do not know how to proceed further. Can anyone suggest me some other simple way to import multiple PST files to Office 365?”

User Query 3- User I was trying to import 5 PST files to Outlook 365 via a web-based import application. I have recently uploaded the files with the help of Microsoft Azure Storage tools. After that, created a ‘PSTImportMappingFile.csv’ file that helps Office 365 in determining which PST belongs to which mailbox. However, most of the mailboxes work fine but some of them return the following error:

“Please create Primary and Archive Mailbox for and create a new job”

So, I created a new job but the things are still the same. Does anyone know what is exactly happening?”
How to Troubleshoot Office 365 Import Failed Error?

This section of the blog will let users know the most common scenarios with a short explanation and some hints for troubleshooting. Now let us discover what are the problems that may cause these errors.

How to Troubleshoot Office 365 Import Failed Error?

first, there are some keytakes which you should prefer.

Problem #1: Import Process Failed at 0%

Error Message:
“import failing to initiate”
“The operation couldn’t be performed because ‘’ matches multiple entries.”

Solution: In the CSV mapping file for the target mailboxes, a user should use unique identifiers like ExchangeGUIDs rather than using the primary SMTP address of the users.

Explanation: The main reason behind this import data to Office 365 error is the soft deletion of mailboxes or mail users. They will combat the targeted user’s active mailboxes when they resolve the primary SMTP address.

Problem #2: If a user has created a job with the deleted job name, it displays an error.

Error Message: “Job with the same name already exists”.

Solution: Always use unique names for the jobs to import PST files.

Explanation: The job names must be unique always, to avoid any such restriction in the future.

Problem #3: There is a difference between the data that is Supposed to be imported and the data that is imported actually.

Error Message: Not Applicable

Solution: Simply execute the following command:
Get-MailboxImportRequestStatistics -identity “Name of Import\GUID |fl

After that, you need to have a look at the following parameters:

  • EstimatedTransferSize: 1.211 GB (1,300,827,963 bytes)
  • BytesTransferred: 64.36 MB (67,487,118 bytes

Explanation: After looking at the figures given above, it is clear that some of the items are already there in the targeted mailbox at the time of import. Hence, to avoid duplicates, some items were left.

Problem #4: CSV mapping files are not validated during the import process.

Error Message: “The specified file could not be found. Please ensure that the path to the file is correct.”

Solution: A user simply re-check the file path in the CSV mapping file.

Explanation: The possible reason behind this is the difference in the cases of file paths.

For example, the path in the mapping file “/test1/OutlookPST/IMPORT/batchA” and the file stored at the Azure Storage account is at: “/test1/OutlookPST/Import/Batcha”. To overcome such an issue, a user is suggested use “/test/OutlookPST/Import/Batcha” in the CSV mapping file.

Problem #5: Office 365 Service is not available

Error Message: Error 403 Forbidden

Solution: Double-check the source and destination path

Explanation: This problem mainly arises when the source and destination are not proper. Moreover, the proper way of using Azcopy Tool is with the help of the below-mentioned command:
AzCopy.exe /Source: /Dest: /V:

All the above-discussed tricks are possible troubleshooting ways to over Office 365 import failed issues. However, if a user is unable to solve the issue by any of the above means, then it is suggested to switch to some third-party tool.

All-in-One Solution to Fix Unknown Error When Office 365 Import Failed

To choose the best software for the import process, a user can try Outlook to Office 365 Migration Tool.

Download Now Purchase Now

This is the expert’s recommended software by various technical researchers. One recommendation from a great technical expert is mentioned for you below:

Paolo Valsecchi, the Vmware Certified Professional-DCV, vExpert

Certified Professional

Apart from this, it all depends on the choice of the user for which he or she wants to go. But, if they are confused and unable to choose between manual tricks and professional, it is recommended to go for the tool to remove the Office 365 Import Failed error. It is one of the efficient applications that require minimum effort and guarantees complete data migration.

So without further ado let’s get to know how this software works.

Easy Steps to Fix Office 365 Import Failed Problem

  • Step 1. Firstly Download & Launch the software on your system and then provide the Source and destination platform.
    Note: Here you can select the source and destination as per your requirement. Here we will proceed with the Outlook (.pst) file format.
    provide source and destination to software Office 365 Import Failed
  • Step 2. Select the category from the workload selection bar and also apply the date range from workload load and apply date range filter
  • Step 3. Provide the folder in file format in the import folder path. and validate the necessary permissions.validate the necessary permissions
  • Step 4. Now provide Office 365 details to the software like Admin Email and Application ID.provide necessary office 365 details
  • Step 5. Validate the necessary permissions and press next.validate necessary permissions
  • Step 6. After performing certain steps lastly, tap to the start import so that your Office 365 Import Failed issue is solved.start import to fix office 365 import issue

After performing these certain steps you will see that you don’t need to look for somewhere else. This will fix your problem without any errors. Hence your all selective data file files be imported to the cloud-based application as per your requirement.

Frequently Asked Questions & Answers

Q. What should I do? Office 365 Import Failed via AzCopy & showing 403 Forbidden Error

Sometimes while Importing PST file Office 365 shows a 403 error. It’s better to use a safer method by using Office 365 Import tool. It is fast as well as a reliable method than AzCopy.

Q. 5  What are the Quick steps to handle Office 365 Import Failed problems?

  • Download & Install the software
  • Provide Source platform and validate
  • Select Destination Platform and Validate
  • Provide necessary details to the software
  • Finally, click on Import button to finish the process
Q. My PST file Corrupted while Importing through AzCopy. How to import the same PST file now without any problem?

First, use the PST Repair tool to recover your corrupted PST file data, and then use Office 365 Importer for the safe transfer of data.

Q. I have multiple Outlook files & Office 365 is showing an error during Import. How to Import them simultaneously?

To import multiple Outlook files it’s better to use an automated tool. It helps you to import multiple PST file at once.

Q. Office 365 is showing a QuotaExceedExpection Error while importing PST file. How to solve this problem?
Office 365 has its limitations on the size of PST file you can Import. Use the PST split tool and then Office 365 Import tool or any other method to import large-size PST files.