At the top of your Outlook ribbon, select File.

 

This is what the ribbon looks like in Outlook 2016.
 

 

 

 

 

 

 

 

Select Open & Export > Import/Export. This starts the Import/Export wizard.

 

 

Choose Open & Export, and then choose Import/Export.

 

 

Select Import from another program or file, and then click Next.

 

Import and Export Wizard

 

 

Select Outlook Data File (.pst) and click Next.

Browse to the .pst file you want to import. Under Options, choose how you want to deal with emails and contacts, then choose Next.

 

Choose the .pst file you want to import.

 

 

 

If a password was assigned to the Outlook Data File (.pst), enter the password, and then click OK.

If you're importing the contents of your .pst file into your Office 365 mailbox, choose that mailbox here.



If you're NOT importing into your Office 365 mailbox, choose Import items into the current folder. This imports the data into the folder currently selected.

 

 

 

To import your email, contacts, and calendar to your Office 365 mailbox, choose that mailbox here.

 

 

Choose Finish. Outlook starts importing the contents of your .pst file immediately. When the progress box disappears, the import is finished.

If you're importing your .pst file to your Office 365 mailbox, you may see a message that it's trying to connect with Office 365. This happens when the Internet connection is interrupted, even for a moment. Once your Internet connection is re-established, Outlook will continue importing the .pst file.