19 October 2026, 08:03 PM
An archived PST file contains previously stored Outlook mailbox data, including emails, attachments, and folder structures. If you want to access an archived PST file in Microsoft 365, you must first import or migrate its contents into your Microsoft 365 mailbox using a supported method. Outlook on the web does not directly open PST files from your computer. Therefore, if you only use the browser version of Outlook, transferring the archived data to your cloud mailbox is a practical way to access older messages online. Before starting, ensure that you have a valid PST file, sufficient mailbox storage, and the required permissions to import data.
The Aryson PST to Office 365 Migration Tool provides an alternative for migrating archived Outlook data to a Microsoft 365 account. It can help users transfer PST mailbox content without manually recreating email folders or moving messages individually. To begin, install and launch the tool, browse and load your archived PST file, and select the mailbox data you want to transfer. Next, connect to your Microsoft 365 destination account using the supported authentication settings and configure the available migration options. Start the migration and allow the process to complete. The exact steps and available options may vary depending on the tool version and configuration.
After the migration, sign in to Outlook on the web using your Microsoft 365 account and check the destination mailbox for the imported emails and folders. Review important messages, attachments, and folder organization to verify that the required data is accessible. Keep the original PST backup unchanged until you have confirmed the migration results.
If your objective is to Open PST File in Office 365, remember that opening a PST file and migrating its contents are different processes. Direct viewing requires a compatible application, whereas migration transfers mailbox data into Microsoft 365 so you can access it online. This approach is useful for retrieving old business correspondence, reviewing archived conversations, and consolidating historical email data in one cloud-based mailbox.
The Aryson PST to Office 365 Migration Tool provides an alternative for migrating archived Outlook data to a Microsoft 365 account. It can help users transfer PST mailbox content without manually recreating email folders or moving messages individually. To begin, install and launch the tool, browse and load your archived PST file, and select the mailbox data you want to transfer. Next, connect to your Microsoft 365 destination account using the supported authentication settings and configure the available migration options. Start the migration and allow the process to complete. The exact steps and available options may vary depending on the tool version and configuration.
After the migration, sign in to Outlook on the web using your Microsoft 365 account and check the destination mailbox for the imported emails and folders. Review important messages, attachments, and folder organization to verify that the required data is accessible. Keep the original PST backup unchanged until you have confirmed the migration results.
If your objective is to Open PST File in Office 365, remember that opening a PST file and migrating its contents are different processes. Direct viewing requires a compatible application, whereas migration transfers mailbox data into Microsoft 365 so you can access it online. This approach is useful for retrieving old business correspondence, reviewing archived conversations, and consolidating historical email data in one cloud-based mailbox.
