The Inactive Exchange Users report shows you how many people have connected to their Office 365 Mailboxes within a given time period.
The “Last Logon Time” value is updated no matter how they connect to their mailbox, including Outlook, Outlook Web Access (OWA), Mobile Device (ActiveSync), POP or IMAP.
Changing the Time Period
The time period selector above the graph allows to specify what constitutes an “Inactive User”.
For example, if you click the 14 Days button the report will display all user mailboxes that have not logged in to their mailbox for 14 days or more.

The All Button
Selecting the All button will display a breakdown of the Last Logon times for all your user mailboxes.  

The Data Table
The data table will show all Inactive Users within a certain time period as well as the Office 365 Licence they have assigned and their last logon date.
If you select the All button, it will display this information for all users.
Naturally this report can be customized, filtered and scheduled like all our other reports.

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