Migrating data especially importing PST files always been a tedious task and pain for an administrators. Utilizing the local cache always won’t be seamless solution for the users to access the data. Now after Microsoft has launched this new Import service tool, Importing PST’s wont be big challenge for Office365 admins. Here we will see how to utilize this service.

This process follows:

  1. Consolidate PST data to network share
  2. Assign “Import & Export” RBAC permission to access Import service
  3. Install Azure Import tool
  4. Prepare CSV file to start importing
  5. Obtain Unique URL Key
  6. Start upload

Consolidate Data:

Consolidate all PST’s and keep it in network share or Drive.

Assign “Import & Export” RBAC permission to access Import service

  • Login in ECP
  • Go to permissions
  • Create new admin role
  • Select “Mailbox Import Export”
  • Add members who need access

Refer Screenshots below:



Admin Roles Import MailboxImport

Install Azure Import too

Prepare CSV file to start importing

Create Csv as mentioned below:

Make one line in the CSV for each PST you wish to import. In the FilePath column for each PST, enter the full “Friendly Path” to that PST. “Friendly Path” means take the path to the PST in your system, and change “\” slashes to “/” slashes, and remove leading slashes, for example:

pst “cy13.pst” stored at \\SERVER01\PSTshareR1\Kingsonfolder, the FilePath column becomes SERVER01/PSTshareR1/Kingsonfolder

The following figure is an example spreadsheet that you can use as a model to create your file:


Obtain Unique URL Key

  • Login to Office365 admin center
  • Click on Import
  • Upload files over network
  • Show Key & Show URL
  • Create a script as below

AzCopy.exe /Source:C:\PST1 /Dest:https://4d66da4ac2854194b2da046.blob.core.windows.net/ingestiondata/C:/PST1 /Destkey:zbTLKZxRlvxQ9K/nNcn6byhMXsyelkuv3l5Po2w52ZgegxXIlgOk8fGdOqpskCGvu1EKIH/ssFH2eHE03naGiA== /S /V:C:\PSTUpload\Uploadlog.log

Check the Slashes (\) in Source and DEST (/)



Now start the Mapping Job from Office365 Portal:

Follow the screenshots:






More details : Click here

Feel free to comment for any questions.


By Kingson Jebaraj

Microsoft MVP, Blogger, Owner and Publisher for Cloudexchangers.com, Microsoft TechNet Author, Solution Architect, Former Office365 Technical Lead for Microsoft(Partner) Extensive knowledge and experience in Microsoft Exchange and Cloud Messaging Services and has got more exposure on Messaging environment deployment,migration,designing and other project management activities, I have earned real time experience in handling multi-site distributed critical large environment of messaging system. Been awarded as an MVP (Microsoft Most Valuable Professional) for Office Servers and services from Microsoft for an exceptional real world contribution made through Microsoft forums and other Microsoft communities. Currently working as “Solution Architect” on Private/Public cloud and SaaS environment for Pacific Controls, UAE, Dubai. One of the largest TIER III certified green data center campus in the middle east.

2 thoughts on “Import PST Files to Office365”
  1. Hello,
    Thank you for such an informative and effective article. I would also like to refer here another effective and reliable PST to Office 365 migration software, which is well known as Kernel Import to Office 365. By using it, you can easily Import complete PST/OST data, including Emails, Contacts, Calendars, etc. into Office365 without any hassle. This software migrates only healthy PST/OST files to Office 365 mailbox. The software compatible with all Outlook versions and Office 365 editions.For any other query about the tool, visit: https://www.nucleustechnologies.com/import-pst-to-office-365/

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