1. Open the Microsoft Outlook desktop application.

  2. Click the People icon.

  3. Click the Home tab at the top of the window and select Address Book in the ribbon.

  4. In the Address Book dialog box, use the drop-down menu next to Address Book and choose Global Address List.

  5. Click the first contact in the list to highlight it and then press 'ctrl'+'shift'+'end' at the same time to select all contacts

  6. Right click any of the highlighted contacts and select Add to Contacts from the context menu. (This may freeze your outlook, this is to be expected)

  7. Go back to the Contacts (or People) section in Outlook to confirm the contacts were added.

  8. If you are using the inbuilt iPhone mail application the contacts should start to sync automatically, if you are using the outlook mail application you will need to do a few extra steps below.

    1. Open the outlook application and click on your initial / picture in the top left hand corner, then click on the cog in the bottom left hand corner.

    2. Locate contacts and click into this menu 

    3. Enable the "Save Contacts" option and follow prompts to complete the syncing of contacts to your mobile phone.