Outlook global contacts not updating
After the initial setup, each time that you connect your i Phone or i Pod touch to your computer, the changes made on your computer or device are synchronized.
Now that your Outlook data is in a file, it's portable.
You can save the file to One Drive or to a USB storage device, for example, and then download it to another computer or another device of your choice.
See import your email, contacts, and calendar to Outlook to learn more.
This cache, sometimes called a nickname cache, is intended to improve user productivity.
Outlook provides a cache of email addresses as you use them in new email messages.
Note: When you get a new computer, you don’t need to export contacts from your old one if your organization uses Microsoft Exchange Server.
Contacts show up automatically when you configure Outlook on the new machine.
When you have Cached Exchange Mode enabled, Outlook by will by default cache the main Global Address List as well.
This is called the Offline Address Book and is being generated on the Exchange server.