Export to a PST File
Go to the Control Panel and click Mail (Microsoft Outlook 2016) (32-bit).
On the Mail Setup dialog box, click the Show Profiles… button.
On the Mail dialog box, click the drag-down arrow under Always use this profile option. Select Outlook, and click Apply > OK.
Now launch Microsoft Outlook on your system. On the taskbar, click the File tab > Open & Export > Import/Export.
On the Import and Export Wizard, select Export to a file. Click Next to continue the process.
On the Export to a File dialog box, select Outlook Data File (.pst). Click Next to continue the process.
On the Export Outlook Data File dialog box, you can either select the entire PST file or any specific mailbox folder. Click Next to continue the process.
Click the Browse… button to define a location where you want to create this new PST file. Name this file and click OK to save it.
Now select the option whether you want to avoid duplicate items or not. Finally, click Finish.
Now close Microsoft Outlook. Again, go back to the Control Panel and click Mail Microsoft Outlook 2016 (32-bit). On the Mail Setup dialog box, click the Show Profiles… button. On the Mail dialog box, click the drag-down arrow under Always use this profile option. Select Outlook 365 Email, and click Apply > OK.
Import PST to Office 365
First, launch Microsoft Outlook on your system. On the taskbar, click the File tab > Open & Export > Import/Export.
On the Import and Export Wizard, select Import from another program or file. Click Next to continue the process.
On the Import a File dialog box, select Outlook Data File (.pst). Click Next to continue the process.
On the Import Outlook Data File dialog box, click the Browse… button to locate the PST file you want to import. Select the PST file, and click Open.
Now select the option Do not import duplicates, and click Next to continue the process. Finally, click Finish. Learn about Office 365 to Office 365 migration in detail.
I hope this method will be useful to import PST files into Office 365.
Paul Wilson
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