Practical Graph: Find Large Mailbox Items with the Microsoft Graph PowerShell SDK
Server-side filtering is always best when PowerShell retrieves items from the server. In this article, we explore how to construct a server-side filter to find large mailbox items over a certain threshold. The answer lies in filtering against an old Outlook property. The Graph represents the property through the single value extended property resource. But how do you filter against such a thing?
January 20, 2026