How To Import OST Files into Office 365?

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How To Import OST Files into Office 365?

You want to import Outlook OST to Office 365 in simple steps, so use the best method of SysInspire OST to PST Converter Software. With this software, any user can smoothly import Outlook OST to Office 365 and more formats such as Office365, Gmail, Yahoo Mail, Zimbra, MBOX, MSG, ICS, vCard, EMLX, and a lot of formats with one simple click of the mouse. This tool is supported on all Outlook software versions such as 2000, 2003, 2007, 2010, 2012, 2013, 2016, and 2019. However, there is no need for Outlook software for conversion or recovery of the OST file.

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Re: How To Import OST Files into Office 365?

Importing OST (Outlook Offline Storage Table) files into Office 365 can be a bit tricky because OST files are designed for offline use in Microsoft Outlook and are not meant to be directly imported into Office 365. However, you can achieve this by following a few steps:

Important Note: OST files are associated with a specific Outlook profile and are essentially a cache of your mailbox data. To import the data from an OST file into Office 365, you will need to have access to the original Outlook profile associated with that OST file. If you don't have access to the original profile, you may not be able to use the OST file for importing.

Here are the steps to import OST files into Office 365:

Convert OST to PST:

Before you can import the data into Office 365, you'll need to convert the OST file to PST format, which is compatible with Office 365. There are third-party OST to PST conversion tools available for this purpose. Make sure to choose a reliable tool to perform this conversion.
Access Office 365 Account:

Sign in to your Office 365 account using Outlook or another email client that supports Office 365.
Import PST to Office 365:

In Office 365, you can use the built-in Import feature to upload the PST file.
Go to the Microsoft 365 admin center (
Navigate to "Data management" or "Security & Compliance" (the location may vary depending on your Office 365 plan).
Select "Import."
Click "New import job" and follow the wizard to create a new import job.
Choose the "Upload your data" option.
Download and run the Azure AzCopy tool to upload the PST file to your Office 365 storage location.
Once the PST file is uploaded, you can map the PST file to the specific mailbox or import the data into a specific mailbox.
Map or Import Data:

In the import job settings, you can choose to either map the PST file to specific mailboxes (which allows you to review and select what data to import) or directly import the data into a mailbox.
Follow the on-screen instructions to complete the import process.
Verify and Review:

After the import process is complete, verify that the data has been imported correctly by accessing the mailbox in Office 365.
It's essential to follow the steps carefully and consider using professional OST to PST conversion tools if you are not familiar with the process. Additionally, be mindful of data security and access permissions during the import process.

If you have a large number of OST files or complex data migration needs, it may be advisable to consult with a professional IT service provider or Microsoft support for assistance with the migration process to ensure a smooth transition.