Outlook 365 - Turning off Cached Mode to Ensure All Email is Downloaded

About Cached Exchange Mode

Cached Exchange Mode enables a better experience when you use an Exchange account. In this mode, a copy of your mailbox is saved on your computer. This copy provides quick access to your data, and it is frequently updated with the server that runs Microsoft Exchange. If you have recently set up your email or are having trouble downloading mail for your shared folder, you may wish to turn off cached Exchange mode to force your client to download your new available mail.

By default cached Exchange Mode is typically on when you add a Microsoft 365 account. We generally recommend using Cached Exchange Mode, unless you are having issues downloading certain mail


Turn Cached Exchange Mode on or off

  1. Click File > Account Settings > Account Settings.Account Settings in the Backstage view

  2. Click the Exchange or Microsoft 365, and then click Change.Change command in the Account Settings dialog box

  3. Under Offline Settings, check Use Cached Exchange Mode to download email to an Outlook data file.Account setup dialog, Exchange Account Settings page.

  4. Exit, and then restart Outlook.

If you want to turn off Cached Exchange Mode, repeat the steps, but clear Use Cached Exchange Mode. By default, 12 months of your email is available offline, but you can control how much mail is kept offline.


Cached Exchange Mode and shared folders

Shared folders include Exchange Public Folders, SharePoint folders, or another person's Exchange folders when you’re using Delegate Access. By default, when Cached Exchange Mode is turned on, a local copy of shared folders is downloaded to your computer.

To change whether shared folders or Public Folders are downloaded when Cached Exchange Mode is turned on, do the following:

  1. Click File > Account Settings > Account Settings.
  2. Click the Exchange account, and then click Change > More Settings.
  3. On the Advanced tab, under Cached Exchange Mode Settings, check the options you want.


Article ID: 2562
Mon 10/18/21 3:49 PM
Mon 10/18/21 3:51 PM