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Exchange Mailbox storage best practices    
Tue, 15 Dec 2020 16:45

  • Never store more than 10,000 items in one folder.
  • Consider removing items from your Spam and Deleted Items folders.
  • Do not exceed more than three levels of folders. For example:
     

    • Best-practice folder level 1

      • Best-practice folder level 2

        • Best-practice folder level 3

          • Not a best-practice folder

 

Microsoft Exchange 2016 mailboxes can be up 50GB maximum, Exchange 2019 mailboxes can be made to go bigger but Microsoft does not recommend it.

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