Highlights:

• Inbox rule report: This new report will list all the inbox rules created by users, along with the complete details of the rules.
  

• Set mailbox storage threshold and retention period:
  
• Specify the maximum storage limit at which the users must be prohibited from sending emails, and the storage limit at which warning must be issued to them.
  
• Specify retention period for the deleted mailbox items.
  

• File audit actions: 3 new actions in OneDrive for Business can now be audited:
  
• Extended File Accesses
  
• Extended File Views
  
• Extended File Modifications
  

• Enable/Disable Mailbox Archive - Enable or disable mailbox archiving for multiple mailboxes in a single window, and configure custom names for mailbox archives.