How to Import OST to Office 365 Webmail?

Learn the step-by-step process to import OST to Office 365 Webmail. Many users want to move their mailbox data to Office 365 to access emails from anywhere.

Microsoft 365 (formerly Office 365) is a cloud-based email service that provides better security, accessibility, and storage options. Migrating OST to Office 365 ensures that your emails, contacts, and calendar events are available online, even if your local Outlook profile is not accessible.

Importing OST to Office 365 is essential when users switch devices, change email providers, or need a backup for their mailbox. However, since Office 365 does not support direct OST file import, you need alternative solutions. This guide covers the methods to upload OST files to Office 365 manually and automatically.

How to Import OST to Office 365 Webmail Free?

The manual method involves converting OST to PST and then importing PST file into Office 365. While this is a free method, it requires technical knowledge and Outlook access, which might not be feasible for everyone.

1. Go to File > Open & Export > Import/Export.
2. Select Export to a file and click Next.
3. Choose Outlook Data File (.pst) and click Next.
4. Select the mail account or specific folders to export.
5. Check the Include subfolders box and click Next.
6. Click Browse to select a folder and click Finish.
7. Next, use Azure AzCopy (a command-line tool) to upload the PST files to Azure storage.
8. Alternatively, copy the PST files to a BitLocker-encrypted hard drive and ship it to a Microsoft data center.
9. Microsoft will upload them to Azure Blob storage for a fee: $2/GB or $2000/1 TB.
10. Create Office 365 user accounts and assign licenses.
11. Map the PST files to the corresponding Office 365 mailboxes.
12. Assign permissions to allow importing.
13. Upload the CSV file to begin importing converted OST files into Office 365.

Note: This method only works if the Outlook profile is active and accessible. If the email profile has been deleted or the OST files belong to old or inactive accounts, this method won’t work. In that case, proceed to Method 2.

How to Transfer Emails from OST to Office 365 Automatically?

Now, try the Advik OST Converter Software to transfer OST files to Office 365 mailbox directly. This software ensures a smooth transfer while preserving the original folder structure, email formatting, and attachments. Whether you need to migrate a single file or multiple OST files, this tool is a reliable solution for effortless and accurate OST to Office 365 migration. Also, it supports to import corrupt or orphaned OST files into Office 365 webmail account. You can even use its advanced filters for selective migration, such as based on to, from, cc, bcc, subject, etc.

Download it’s free trial to check how it works effectively;

Steps to Import OST to Office 365 Account

Step 1. Launch the software & add Outlook OST file to the software.

Step 2. Choose the mailbox folder(s) to migrate to Outlook 365.

Step 3. Select Office 365 as a saving option from the list.

Step 4. Enter Office 365 email address and click the Next button.

Step 5. Lastly, sign into the Microsoft page with login credentials.

Here, the OST to Office email migration process has been started.

Once completed! you will be confirmed through a log report. Click OK.

Now, log in to your Office 365 account and check all the transferred emails there.

Watch How to Open OST File in Office 365

Conclusion

This article explains two simple ways to import OST to Office 365 mailbox. You can choose the method that fits your needs. However, if the OST file is not linked to its current Outlook profile, importing it manually into Office 365 is not possible. In such cases, you will need to use an automated method to directly import OST file into Office 365 account. Whether you’re looking to import multiple files or recover data from inaccessible OST files, this tool can help. You can also try the free demo version to see if it works for you.

FAQs

Q1. Can I directly import OST file into Office 365 Webmail?

Ans. No, Office 365 does not support direct OST file imports. You need to first convert the OST file to PST and then use Microsoft’s Import Service or an OST to Office 365 migration tool.

Q2. What happens if my OST file is orphaned or inaccessible?

Ans. If your OST file is orphaned (not linked to Outlook), you cannot access it directly. In such cases, you need an OST to Office 365 Converter tool to extract emails and upload them to Office 365.

Q3. Will my email attachments and folder structure be preserved after importing to Office 365?

Ans. Yes, if you use a reliable OST to Office 365 migration tool, it will maintain the folder structure, email metadata, and attachments during the transfer process.

Q4. How long does it take to import OST to Office 365?

Ans. The time required depends on the OST file size and the migration method used. Manual methods take longer, while automated tools can complete the process in just a few minutes.

Q5. Can I transfer multiple OST files to Office 365 at once?

Ans. Yes, using an OST to Office 365 Converter tool allows batch migration, enabling you to transfer multiple OST files in one go without data loss.