Need help understanding Mailbox usage

New Contributor

According to the O365 admin center, our storage used for mailboxes is slowly increasing. As expected. Some days ago though, the graph started diving down. In a week it decremented more than 100gb (from 600gb +). Then it shot up again. Graph is attached.


This isn't us doing cleanup or anything, so whats happening here?

2 Replies
best response confirmed by johnnyas (New Contributor)

There's an issue going on with reports currently, check your SHD:


Title: Microsoft 365 reports data may be inaccurate User Impact: Admins may notice that Microsoft 365 reports from January 10, 2020 to January 15, 2020 aren't accurate. More info: The affected reports are as follows: Exchange: Email Activity, Email app, Mailbox usage


@Vasil MichevExcellent, thanks!