In Office 365 Creation dates of users, groups, mailboxes, public folders, Shared mailboxes, security and distribution groups give an indication of the growth of these entities in Office 365 and is a good metric for capacity planning. While creation dates alone may not be sufficient to gauge growth, it is a useful factor in determining say, the number of users and mailboxes that are created each month or quarter or year. Such reports give administrators a very useful metric that they can use as a Office 365 usage and growth summary in their presentations to their management.
This report shows the list the count of distribution groups based on created date.
This report shows the list the count of security groups based on created date.
This report shows the list the count of shared mailbox based on created date.