Fixed Cache Settings in Outlook

Fix Cache Settings in Outlook (Fixes Search issues)

Outlook 2013/2016/2019

  • Outlook 2010
  • Outlook 2007
  • Outlook for Mac 2011/2016
    Note: by default Cached Exchange Mode is enabled when adding an Exchange account. 
    For system recommendations for using Cached Exchange Mode, see the section  Outlook Cached Mode Recommendations below. 
    Note: if you want to turn off Cached Exchange Mode, follow the same steps, but make sure that the box next to   Use Cached Exchange Mode is unchecked. 

    In Outlook 2013/2016/2019:
    1. In Outlook, go to the File > Account Settings, then click on Account Settings again in the dropdown.
    2. In the E-mail tab, select your Exchange account and click on Change.
    3. In the Exchange Server Settings window, check Use Cached Exchange Mode and click on Next.
    4. You should be back at the Email Accounts window. Click on Finish.
    You should see a notification window that advises you to restart Outlook in order for the change to take effect: 
    When you re-launch Outlook, it will begin to make a copy of your Mailbox content to your computer. This will take some time. Not all items will be immediately available. If you have a large mailbox or a slow Internet connection, it can take an hour or more.  

    Outlook Cached Mode Recommendations:
    •  It is not recommended to use Cached Mode when the mailbox size is greater than 25 GB as it might cause performance issues.
    •  By default, the overall size of .ost files has a preconfigured limit of 50 GB.

    In Outlook 2010:
    1. In Outlook, go to the File > Account Settings, then click on Account Settings again in the dropdown.
    2. In the E-mail tab, select your Exchange account and click on Change.
    3. In the Exchange Server Settings window, check Use Cached Exchange Mode and click on Next.
    4. You should be back at the Email Accounts window. Click on Finish.
    You should see a notification window that advises you to restart Outlook in order for the change to take effect: 
    When you re-launch Outlook, it will begin to make a copy of your Mailbox content to your computer. This will take some time. Not all items will be immediately available. If you have a large mailbox or a slow Internet connection, it can take an hour or more.  

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