Working Guide Of The MailsDaddy OST To Office 365 Tool
Working Guide of the software
Compelete Data Migration (13 Steps)
Click on any screenshot to view full resolution.
Download and install the OST to Office 365 Migration Tool (Installation Guide included)
Launch the software and click the “Get Demo” button to use the free trial. If you’ve already purchased the software, you can activate the full version directly.

Add & Browse Source Files
On the first screen, click the "Open" button to browse and select OST files from your local system.

Preview Mailbox & Email Contents
You can now view the complete OST file database in the software’s preview panel.

Preview Window
Click the “Migrate” button to upload and transfer the offline OST files to your Office 365 account.

From the right-side panel, select the OST file folders
Then choose the specific items—Emails, Contacts, Calendar, Tasks, or Notes—that you want to migrate.
Configure & Process Mailbox
Select the mailbox: Primary, In-place Archive, Shared mailbox, and Group mailbox based on your requirement. If you want to migrate data into a specific folder then specify the new folder name.
Date filter is also optional choice
Enable the Date Filter option and enter the start and end dates.
Apply Filters & Select Items
Enable/Disable incremental migration then click the browse icon and choose the location where you want to save the migration log file. At last, click the Next button to continue.

Choose an option to validate your Office 365 account: automatica or manual
Both are safe way to verify Microsoft 365 account.
Fill Login Detail
Manually, you have create Tenant ID, Client ID, or Client Secret (Value), following our guide on the left side of the software panel.

After verification, specify the target email
address and click on Start migration button.

Start Migration & Monitor Progress
The software will start the migration process. Monitor the real-time progress bar as mailboxes are uploaded to your Office 365 account.

Complete Migration & Confirmation
Once completed, a confirmation popup will appear stating: "Your data has been migrated successfully to your Microsoft account." Click OK to finish and access your migrated data in Office 365.

Ready to Start with OST to Office 365 Migration?
Download the free trial version to preview all mailbox items or buy the full license for unlimited conversion.