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Introduction
Changing to Cached Exchange Mode is recommended to improve Outlook’s performance and smooth end user computing experiences, and is recommended for all users, especially if Outlook is performing slowly, or if it hangs or freezes. This guide will explain:
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How to Enable Cached Exchange Mode in Outlook
Open Outlook and click File to open the Account Information menu.
Click Account Settings, then click Account Settings… in the menu that drops down.
Select your email address, then click Change.
Under Offline Settings, check Use Cached Exchange Mode.
If the Mail to keep offline slider is not set to All, click and drag the slider to the rightmost position. This will ensure that Outlook makes all your mail items available, including your archived items.
Please note: This setting will not change the mail retention policies, and you will still need to archive messages you wish to keep past 180 days. Messages in archive folders will also still be deleted according to the retention policies of their respective archive folders.Click Next.
If prompted that you need to restart Outlook, click OK.
Click Finish
Close and restart Outlook.
When Outlook opens in Cached Exchange Mode for the first time, it will show all of your folders, but they will all be empty at first. This is normal and expected, Outlook will download all of your mail, which may take some time. For most users this will take about 15 minutes. If you have more than one thousand emails, it will likely take significantly longer to download all your mail items. However, Outlook will only need to do this once barring a major change, such as:
You get a new computer
Your computer suffers a catastrophic failure
Etc.
Enable Automatic Send/Receive for Cached Exchange Mode
Open Outlook and click File.
Click Options.
Click Advanced, then Send/Receive…
Select the All Accounts group, then check Include this group in send/receive (F9) and Schedule Automatic send/receive every … minutes.
Click Close.
Note: If you change the send/receive frequency, it is recommended that you leave at least 10 minutes between every automatic send/receive for best performance.Click OK
