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 Use Archiving to save OST emails to PST
By enabling the Auto Archive method in Outlook, you will be able to save the items of the OST file in a separate PST file. This method helps you to keep the size of your mailbox manageable. When there are many older messages and you do not require them in the mailbox, you can put them in the archive folder easily. This will reduce the size of the mailbox. Follow the simple steps to enable auto archiving in Outlook.

Launch the Outlook application, go to File and click Options.
Go to Advanced and click Auto Archive Settings.Auto Archive Settings
Now select the number of days in which you want to run auto archiving. Select the folder to save the archived file; also, provide the archiving options and finally click OK.Select the folder to save the archived fileWith this, mailbox items from your OST file will be saved to the PST file as per your archiving settings.

Cigati OST to Office 365 Migration Tool is the most powerful solution to migrate OST to Office 365 Mailbox account. It supports all versions of MS Outlook. Using the tool, you can perform selective migration of OST to Office 365.  The tool provides an option to filter the OST file according to Date, To, From, and Subject. To know more about the tool, download its free version.

You can perfectly import OST to Office 365 using Shoviv OST to Office 365 migration Software; follow the given steps:

Install and launch Shoviv OST to Office 365 Migration tool.
Make click on the ADD PST/OST Files and choose OST files.
Add OST files and check them.
Now you can have a view of selected OST files.

Hope This Helps,
Peter

You can use Aryson OST to PST Converter to convert OST to Office 365. It is an advanced tool that efficiently converts OST files to various file formats. It imports all mailbox items like emails, contacts, calendars, journals, tasks, notes, etc. The software Imports Ost files to Office 365, Yahoo, Gmail, Hotmail, IMAP Server, OperaMail, Thunderbird, and other email clients. OST files of Outlook 365, 65, 2019, 2016, 2013, 2010, and older versions are supported. 

For the best conversion of OST files into Office 365 files, you can use DRS OST to PST Converter. This advanced utility converts OST to Office 365 and provides the option to save OST files into multiple file formats. It supports bulk conversion and offers so many advanced features like a mail filter, date filter, and data preview. A free trial version is also available for the analysis tool's features.

MigrateEmails OST to PST Converter tool provides an effective solution for conversion of lotus Notes to MS Outlook; it can migrate many more files like Outlook OST to Office 365, Gmail, Yahoo Mail, Thunderbird, AOL, Hotmail, IMAP, Opera Mail, Zoho Mail,

The software supports all the MS Windows and Mac versions.

There are no direct methods to OST to Office 365 Migration to Import OST File into Office 365. However, you can Migrate Offline OST files to Outlook PST files format without installing Outlook, and we upload the PST files to Office 365. ToolsCrunch Convert OST to Outlook PST tool recovers and repair damaged corrupted OST data files. Technical or non-technical both can easily use this software without having any technical skills. This software is Compatible with Mac OS 13, 12, 11, 10.15, 10.14, and Windows OS up to (32 and 64 Bit) 11, 10, 8.1, 8, 7, Vista, XP, etc. Try the free Trial version of the convert and migrate a few emails free of cost.

To import OST files into Office 365 or PST files into Office 365, one can use Shoviv PST to Office 365 Migration tool. It is a secure and simple solution to quickly import OST/PST files into Office 365. You can add multiple files at once and migrate them concurrently. A free demo version of this tool is also available.

Read More: https:/shoviv.com/ost-to-office365.html