Mailboxes

Manage Microsoft 365 mailboxes and mail flow via the Microsoft Graph API.

39|17|Updated Feb 4, 2026

Search Tags:#email #microsoft graph #mailbox #m365 #mail flow #exchange online

Ready to run

npx skills add https://github.com/wyre-technology/msp-claude-plugins --skill mailboxes

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Mailboxes
Source: https://github.com/wyre-technology/msp-claude-plugins/tree/main/msp-claude-plugins/m365/m365/skills/mailboxes
Command: npx skills add https://github.com/wyre-technology/msp-claude-plugins --skill mailboxes

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill streamlines the management of Microsoft 365 mailboxes, addressing common MSP tasks such as searching emails, managing shared mailboxes, and diagnosing mail flow issues.

Core Features & Use Cases

Email Searching: Quickly find specific emails within a user's mailbox.
Shared Mailbox Management: Assist in managing access and configurations for shared mailboxes.
Mail Flow Diagnostics: Troubleshoot delivery failures and understand NDRs.
Out-of-Office Management: Set or disable automatic replies for users.
Use Case: An MSP technician needs to find a critical email sent to a client last week that the client cannot locate. This Skill can be used to search the client's mailbox for the email based on sender, subject, or date range.

Quick Start

Use the mailboxes skill to search for emails from '[email protected]' received in the last 7 days for user '[email protected]'.

Frequently Asked Questions about Mailboxes

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I search for specific emails in an M365 mailbox?▼

You can search for specific emails in an M365 mailbox by using this Skill to query the Microsoft Graph API, filtering by sender, subject, or date range. It retrieves messages directly from the target user's mailbox.

Can I manage shared mailbox access and settings in Exchange Online?▼

Yes, you can manage shared mailbox access and configurations in Exchange Online. The Skill uses Microsoft Graph API endpoints to assist with access control and settings for shared mailboxes.

What is the best way to set out-of-office automatic replies for M365 users?▼

The best way to set out-of-office automatic replies for M365 users is through this Skill, which configures and disables automatic reply settings via Microsoft Graph API endpoints for the specified user mailbox.

How do I diagnose mail flow issues and delivery failures in Microsoft 365?▼

To diagnose mail flow issues and delivery failures in Microsoft 365, this Skill analyzes non-delivery reports (NDRs) and leverages Graph API reporting endpoints to troubleshoot and identify the root cause of delivery problems.

How can I check an Exchange Online mailbox size for a specific user?▼

You can check an Exchange Online mailbox size by using this Skill to query the Microsoft Graph API for mailbox settings and reporting data, allowing you to review the current storage usage for a specific user.