Microsoft 365 User Mailbox Management Using Graph PowerShell

Email remains a core workload in Microsoft 365, and mailbox management is a daily task for administrators. Whether it’s retrieving emails, organizing messages, handling compliance scenarios, or cleaning up mailboxes, admins need reliable automation beyond portal-based workflows.

With Microsoft Graph PowerShell, you can programmatically manage Microsoft 365 user mailboxes—retrieve messages, move or copy emails between folders, delete messages, and even analyze mailbox activity at scale.

This article acts as a central hub for Microsoft 365 mailbox management on M365Corner, linking to focused guides that cover each mailbox operation in detail.

• Retrieve Emails from Microsoft 365 User Mailboxes Using PowerShell

Before performing any mailbox operation, administrators typically need to retrieve email messages from a user’s mailbox. This could be for investigations, audits, or general reporting.

Graph PowerShell allows you to fetch user messages, apply filters, and select only the properties you need.

👉 Retrieve Microsoft 365 user emails using Graph PowerShell
Learn how to list and query mailbox messages with Get-MgUserMessage:

🔗 https://m365corner.com/m365-powershell/using-get-mgusermessage-in-graph-powershell.html

• Move Emails Between Mailbox Folders Using Graph PowerShell

Organizing mailbox content is a common administrative requirement—especially when archiving, categorizing, or restructuring folders.

With Graph PowerShell, you can move one or multiple emails from one folder to another without user interaction.

👉 Move Microsoft 365 user emails using PowerShell automation
Follow this guide to move messages using Move-MgUserMessage:

🔗 https://m365corner.com/m365-powershell/using-move-mgusermessage-in-graph-powershell.html

• Copy Emails Without Removing the Original Message

In some scenarios—such as investigations or backups—you may need to copy emails while keeping the original message intact.

Graph PowerShell supports copying mailbox messages to other folders seamlessly.

👉 Copy Microsoft 365 mailbox emails using Graph PowerShell
Learn how to duplicate messages using Copy-MgUserMessage:

🔗 https://m365corner.com/m365-powershell/using-copy-mgusermessage-in-graph-powershell.html

• Delete Emails from Microsoft 365 User Mailboxes

Mailbox cleanup, policy enforcement, or user offboarding often requires deleting specific emails or bulk messages.

Using Graph PowerShell, administrators can remove messages safely and programmatically.

👉 Delete Microsoft 365 user emails using PowerShell
Read this detailed guide on removing messages with Remove-MgUserMessage:

🔗 https://m365corner.com/m365-powershell/using-remove-mgusermessage-in-graph-powershell.html

• Get Email Count from Microsoft 365 User Mailboxes

Understanding mailbox usage is crucial for reporting and capacity planning. Instead of retrieving every message, Graph PowerShell allows you to fetch only the message count, saving time and resources.

👉 Get Microsoft 365 user mailbox message count using PowerShell
Learn how to retrieve message counts efficiently with Get-MgUserMessageCount:

🔗 https://m365corner.com/m365-powershell/using-get-mgusermessagecount-in-graph-powershell.html

• Retrieve Unread Emails from Microsoft 365 User Mailboxes

Unread emails often indicate pending actions or missed communications. Administrators may need to retrieve unread messages for monitoring or automation scenarios.

👉 Retrieve unread Microsoft 365 emails using Graph PowerShell
Explore this guide to fetch unread messages from user mailboxes:

🔗 https://m365corner.com/m365-powershell/retrieving-unread-emails-with-graph-powershell.html

• Retrieve Flagged Emails for Follow-Up

Flagged emails are critical for tracking tasks and follow-ups. With Graph PowerShell, admins can retrieve flagged messages to support reporting or escalation workflows.

👉 Retrieve flagged Microsoft 365 user emails using PowerShell
Follow this practical guide for retrieving flagged messages:

🔗 https://m365corner.com/m365-powershell/retrieve-m365-user-flagged-emails-using-graph-powershell.html

• Retrieve Important Emails from Microsoft 365 User Mailboxes

Important emails are often business-critical and may need special handling during audits or investigations.

Graph PowerShell allows administrators to identify and retrieve messages marked with high importance.

👉 Get important Microsoft 365 emails using Graph PowerShell
Read this guide to retrieve important emails from user mailboxes:

🔗 https://m365corner.com/m365-powershell/get-important-emails-from-user-mailbox-using-graph-powershell.html

Conclusion

Managing Microsoft 365 user mailboxes doesn’t have to rely on manual Outlook or admin portal actions. With Graph PowerShell, administrators can automate mailbox retrieval, organization, cleanup, and analysis with precision and consistency.

This cluster article serves as a central reference point for Microsoft 365 mailbox management on M365Corner, connecting focused PowerShell guides into a cohesive admin workflow.