Note: After adding the OST Files, you have to select Outlook PST as the target.
The first way is to choose the Outlook PST option from the ribbon bar, and the second way is to right-click on the file folder and select the same option (Outlook PST).
Step 1: After that, check the Select Sub Folders option to include all subfolders in the OST to PST conversion task. You can also select manually to add particular subfolders from the list.
Custom Folder Selection: Enables you to choose specific folders for processing, ensuring only required data is included in the job.
Step 2: After click on next button, There are two ways to Export items in PST.
OR
After that click on Next button.
Step 3: Thereafter, you can use the Message Class and Message Date filters to include/exclude the mailbox items.
Select the Advanced Option to make other changes, like managing item thread count, folder mapping and email translation. After setting up these options, click the Next button.
https://www.shoviv.com/technical-guide/migation-advance-option.html
Step 4: Now the process will start and status will be shown. The Status wizard will show Source Folder, Target Folder, Item Count, Filtered Items, Copied Items, and Process Item in this report.
You can stop the process using the 'Stop' button, else wait for the process completion.
Once the process gets completed successfully. Click on the 'OK' button. And you can also save the report using the 'Save Report' button and at last click on the 'Finish' button to finish the process.