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.
If you want to open a shared mailbox using Outlook on the web or Outlook Web App instead of Outlook, see Open and use a shared mailbox in Outlook Web App.
If you choose Install anyway and upgrade to Outlook 2016 for Windows, then when you try to connect to a primary, shared, or delegate mailbox or folder, you get the following error message: The resource that you are trying to use is located on an unsupported version of Microsoft Exchange. Then, when you open Outlook, you get another error message telling you Outlook can't open your data files.
Or, when you try to open a Public Folder, you get the following message: Cannot expand the folder. Network problems are preventing connection to Microsoft Exchange.
To change whether shared folders or Public Folders are downloaded when Cached Exchange Mode is turned on, do the following: Cached Exchange Mode enables a better experience when you use an Exchange account.
A shared mailbox can be a practical solution for any business with groups of people working from different locations.