Admins often have full access permissions in Office 365 to open another mailbox. One reason is that they might need to make sure the mailbox is good to be deleted after a user departs from the organization. However, there’s always a chance that they might misuse their privileges and access mailboxes they shouldn’t, such as the CEO’s mailbox. How can you make sure there’s no such privilege abuse in your Office 365 environment? To secure your critical Exchange Online content, you need to know about all non-owner mailbox access events and what exactly the non-owner did in that mailbox — which folders they read and which mailbox items they modified, moved or deleted.
To make sure no Office 365 admins access a user mailbox without a valid need and that they perform no unauthorized actions in the ones they do access, monitoring Office 365 full access permissions is a good start, but not sufficient. You also have to keep an eye on non-owner mailbox access events so you can respond to unwarranted actions before your data is compromised.
You can start monitoring which Office 365 admins view other mailboxes’ content with the native tools. But first you’ll have to enable mailbox auditing. If it’s not set by default, be ready to revamp your PowerShell skills, because you’ll need them to put together a script. Then you can view a report on non-owner mailbox access in the Office 365 Security and Compliance Management console; however, don’t expect to be able to get the report easily. There’s no subscription option, so you’ll have to manually go get it. Then you’ll need to export it into Excel or another format, and then massage the resulting spreadsheet into a ready-to use, readable report. Wouldn’t you prefer an option that involved far less effort and stress?
Are you ready for the simplest and the most reliable way to prevent privilege abuse in your Office 365 environment? Netwrix Auditor for Office 365 delivers pervasive visibility into Exchange Online, SharePoint Online, and OneDrive for Business with Office 365 audit reporting you can rely on. And when it comes to keeping an eye on non-owner mailbox access, you can be sure the solution has you covered.
With Netwrix Auditor for Office 365, you can: