Advanced Email Migration to Office 365 from a POP3 Service Provider – Part 5


Client Setup and Data Migration

Now that we have email flowing into Office 365 for, we need to import all the old email, contacts and calendar items to Office 365.

Set up and Configure Office Desktop Apps

This setup will install the Microsoft Online Services Sign-in Assistant and help configure Outlook, SharePoint and Lync 2010. It will also install any updates critical for these applications to function with Office 365.

  1. Open Internet Explorer to

  2. Login with your federated user account (
  3. Click Downloads
  4. Right side of the page, located under Resources
  5. Browse to ‘Set up and configure your Office desktop apps’
  6. Click Setup button
    • Located under “Set up and configure your Office desktop apps”
    • Run the installer and it will guide you through the installation

Setup Outlook to Connect to Office 365


  1. In order to move email from the current POP3 solution to Exchange Online (Office 365) we need to import your current email for the POP3 PST within Outlook. All the steps are completed within Outlook 2010.
  2. Setup Outlook Profile for Office 365
  3. Click Start
  4. Open Control Panel
  5. Click Mail
  6. Click Show Profiles
  7. Click Add…
  8. Enter a new profile name
  9. Click OK
  10. Enter your Name
  11. Enter your Email Address
  12. Enter your password
  13. Click Next
  14. Verify you get three green check marks and click Finish
  15. The Mail Control Panel will open
  16. Verify that ‘Always use this profile’ is checked
  17. Verify that the new profile you just created is selected. If not, use the drop down menu and select it.
  18. Click OK

Login to Office 365 with Outlook and Import Email

  1. Open Outlook 2010
  2. Enter your username and password, click OK
    2. Domain Password
  3. Click the File menu
  4. Navigate to Open

  5. Click Import (as shown in the screenshot below)
  6. Select Import from another program or file click Next.
  7. Select Outlook Data File (.pst) and click Next.
  8. Browse to and select the exported file, click Next.
  9. Enter the password. Click OK
  10. Select the folder to import from (don’t change any settings)
  11. Verify Include subfolders is checked

  12. Click Finished

Note – This process will import all the contents from your PST file into Office 365. After this you can remove the PST file and forget about them. Office 365 has 25GB mailboxes.

Series of Posts

  1. Advanced Email Migration to Office 365 from a POP3 Service Provider – Part 1
  2. Office 365 and DNS Setup for the Transition Email Domain – Part 2
  3. Adding an Email Alias to an AD Account and Syncing Changes to Office 365 – Part 3
  4. POP3 Email Forwarding to Office 365 – Part 4
  5. Client Setup and Data Migration – Part 5


Thanks for visiting and reading my posts. I am always looking for more ideas. Please comment or email me with what you would like to see.

Kelsey Epps

Office 365 MVP

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