MS Outlook stores a synchronized copy of your mailbox from your Office 365, IMAP, and Exchange or Outlook accounts on your local computer storage as an offline file. This is known as Offline Outlook Data file. While using outlook, many a time Mac outlook rules not working, due to the rules exceed the rules quota established for your mailbox, Corruption in Outlook send and receive an error, and rules set to run on one device only. To fix the issue, you can easily create rules and also modify them as per your requirements. Managing rules is not a complicated task for everyone. It is one of the processes that can daily work easy and efficiently.