How to Import OST Emails to Microsoft Office 365?

In January 1997, Microsoft introduced MS Outlook with Office 97. It is a personal information manager. Although often used as a desktop email application. Microsoft uses OST (Offline Storage Table) and PST (Personal Storage Table) as data files. These data files store entire data on the local machines.

The OST file is a replica of the exchange mailbox. It allows users to access previously downloaded data with no internet connection. Users can edit or change the data offline and when the internet is available, then data will sync with the mailbox automatically. The OST file supports only the Exchange server.

The PST file store all items like email, contacts, calendars, etc. On your machine. This file also supports exchange, but not recommended.

In today's world, many organizations want to import OST emails to Office 365 cloud platform, so they can universally access their data and avoid Exchange maintenance downtime.

How to import OST to Microsoft Office 365?

To import OST to Office 365, you need to convert OST to PST, then upload the converted file to office 365.

Note: Please take a backup before trying any method.

Convert OST to PST by using the export option of Microsoft Outlook.

  1. Open MS Outlook application
  2. Go to File option
  3. Select Open & Export option
  4. Click on the Import & Export option
  5. Select Export to a file and click Next button
  6. Select outlook data file (PST)
  7. Choose the folders you want to export and also select the checkbox to include sub-folders
  8. Set a location to export
  9. Click on Finish

Note: This export method works only if the user account is connected to the Exchange Server.

Upload converted PST to Office 365 by using Azure AzCopy

  1. Copy the SAS URL
  2. Download Azure AzCopy
  3. Upload PST to Office 365
  4. View the list of upload PST files (Optional)
  5. Create the PST Import mapping file (CSV)
  6. Create an Import job in Microsoft Office 365 to Import PST
  7. Filter data and start the PST Import job

Note: This method is very helpful but tedious and time taking. To upload a new batch of PST files, you need to repeat step 3 to step 7.

Use the SysCurve OST to PST Converter Tool

To avoid these methods, you can use third-party SysCurve OST to PST Converter software. It easily migrates OST to Office 365 Mailbox with no problem. The third-party software can also quickly recover your data from corrupted OST file and convert them into healthy Outlook PST file format. Using this OST Converter tool, you can convert OST to PST, MSG, MBOX and EML file format. You can also migrate OST to Office 365 and live exchange server. To convert OST to PST free, You can try the free OST to PST Converter tool to preview OST data and also export the first 20 items from every folder.

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