Microsoft has done an incredible job over the past 4 years increasing performance of Outlook on an Exchange server. In older versions of Outlook and Exchange every time you changed folders or opened an item in Outlook it would have to request that item or list of items from the server directly. This made Outlook very slow if you had any network or Internet issues and made accessing Outlook data when you were not on-line impossible. So much for working on the plane!

Well now things are much different. When you configure Outlook to run in Cache Mode (which is really easy to do and a default setting for newer versions of Outlook) not only can you access your Outlook Data when you are off-line but it also speeds up Outlook considerably.

What is Cache Mode?

It is a simple concept really. What Outlook does in cache mode is it keeps a copy of all your Outlook data on your computer and makes sure that copy is always in sync with your mailbox on the Exchange server. So when you change folders or open an item it does all this looking at the copy on your computer instead of having to go over the Internet or network to get it from the server every time.

How do I get Cache mode to work on my pc? 

If you want to make sure you are running in cache mode or want to know how it is done - watch the quick 2 minute video below.

Video - Outlook Cache Mode