Simply Drag and Drop individual folders (or emails) one at a time from your Personal / Archive folders (pst files) to your desktop Outlook Inbox OR you can right-click on a folder, select ‘Move Folder’, select the target folder, then click OK.

These new Outlook folders will then show in your Office 365 email:

• If moved to the Inbox, and there is no folder with the same name, it will create a new folder
• If moved to the Inbox, and there is a folder with the same name already, it will create a second folder named subfolder (2)
• If moved to a subfolder with the same name, it will create an additional subfolder under it with the same name

• Will import the entire Personal / Archive folder to Office 365
• Will merge the emails into a folder with the same name OR will create a new folder if no folder with the same name exists

STEP 1. Make sure the Personal / Archive folder (pst file) is not in use

The Personal / Archive folder (pst file) cannot be in use during this process. If it is (you can see it on the left side of your Desktop Outlook), follow these steps to remove it from use:

How to find the name and location of your .pst file:
- Right click on your Personal Folder or Archive folder, select Data File Properties, Advanced button.
- Look at the file location - that will contain the location and the actual filename.

In Outlook (on your computer), click the File tab, select Account Settings, Account Settings.

Select the Data Files tab

Select the .pst file that you want to move, and click the Remove button, then Yes to confirm

Close Outlook and reopen it. The Personal / Archive folder (pst file) should no longer show on the left side.

STEP 2: Move the Personal / Archive folder (pst file)

In Outlook (on your computer), click the File tab

Click Open, then click Import.

In the Import and Export Wizard, click Import from another program or file, and then click Next.

Click Outlook Data File (.pst) you want to move, and then click Next

Click Browse, and then choose the .pst file to import

Choose a duplicate option (if unsure, select ‘Allow duplicates to be created’) 

- Replace duplicates with items imported - Existing online email will be overwritten with any duplicates from your Personal / Archive folder.
- Allow duplicates to be created - Existing online email will not be overwritten, and any duplicates from your Personal / Archive folder will be added.
- Do not import duplicate items - Existing online email will be kept, and any duplicates in your Personal / Archive folder will not be imported.

Click Next
Note: If you protected your Personal / Archive folder (pst file) with a password, you will be prompted for it.

If you get the message ‘This outlook data file is already in use’, go back to Step 1 to remove the Personal / Archive folder (pst file) from use:

Select Import options and Click Finish:

- The top folder (usually Personal Folders, Outlook Data File, or your email address) is selected automatically.
- Checking 'Include subfolders' means all folders under the folder selected will be imported.
- Select 'Import items into the same folder in'. This is the option that matches the folders from your Personal / Archive folder (pst file) with the folders in your target folder. If a folder doesn't exist in your target folder, it will be created.