Get-MgUserMailboxSetting: How to Retrieve and Manage Mailbox Settings

This guide explores Get-MgUserMailboxSetting in Graph PowerShell. Learn how to retrieve mailbox settings such as automatic replies, time zones, and language preferences with step-by-step examples

The Get-MgUserMailboxSetting cmdlet is a powerful tool for administrators to retrieve mailbox settings for a specific Microsoft 365 user. This cmdlet is part of the Microsoft Graph PowerShell module and it allows you to gather various configurations related to a user's mailbox such as automatic replies, email signature, time zone, and language settings.

Cmdlet Syntax

Get-MgUserMailboxSetting -UserId <String>

Parameters:

• -UserId: The unique identifier or User Principal Name (UPN) of the user whose mailbox settings you want to retrieve.

Usage Examples

Retrieve Mailbox Settings for a Specific User: This example retrieves the mailbox settings for a user identified by their UPN:

Get-MgUserMailboxSetting -UserId "john.doe@yourdomain.com"

Retrieve and Display Automatic Replies Settings for a User

This example demonstrates how to fetch and display the automatic replies (out-of-office) settings for a specific user:

# Retrieve mailbox settings for the user
$MailboxSettings = Get-MgUserMailboxSetting -UserId "john.doe@yourdomain.com"
# Display automatic replies settings
$MailboxSettings.AutomaticRepliesSetting

This script retrieves the mailbox settings for the specified user and outputs the automatic replies configuration, including status, internal and external messages, and scheduled start and end times.

Retrieve Working Hours Settings for a User

This example shows how to obtain and display the working hours configuration for a user's mailbox:

# Retrieve mailbox settings for the user
$MailboxSettings = Get-MgUserMailboxSetting -UserId "jane.smith@yourdomain.com"
# Display working hours settings
$MailboxSettings.WorkingHours 

This script fetches the mailbox settings for the specified user and displays their working hours, including days of the week, start and end times, and time zone information

Cmdlet Tips

• Use Detailed Filtering: When you need to retrieve specific properties (like automatic replies or time zone), save the output in a variable and filter through it using the desired property.
• UserId Parameter: Always ensure that you provide a valid User Principal Name or Object ID. If you're uncertain of the user's ID, you can fetch it using the Get-MgUser cmdlet.

Possible Errors & Solutions

Error	Cause	Solution
ResourceNotFound	The specified UserId does not exist or the user does not have a mailbox associated.	Verify that the UserId is correct and that the user has a valid mailbox in Microsoft 365.
InvalidAuthenticationToken	The token used for authentication has expired or does not have the necessary permissions.	Refresh the authentication token and ensure that your account has the required permissions to access mailbox settings.
AccessDenied	You do not have permission to access the mailbox settings for this user.	Ensure that your user account has the appropriate roles and permissions to retrieve mailbox settings. Assign roles like Mailbox Admin if required.

Use Cases

• Automating User Setup: When onboarding new users, administrators often need to configure mailbox settings to match company standards. This cmdlet can be used to check if users have the appropriate automatic replies, time zone, and email signature settings in place.
• Compliance Monitoring: Regularly auditing mailbox settings for users can help ensure that no unauthorized changes have been made to critical settings like email forwarding or automatic replies, which could lead to potential data breaches.
• Localized Mailbox Configuration: If your organization operates in multiple regions, you might want to confirm that the mailbox settings (like time zone and language) are correctly set for users based on their geographical location.

Frequently Asked Questions

• What is Get-MgUserMailboxSetting used for?
  Get-MgUserMailboxSetting is a Microsoft Graph PowerShell cmdlet used to retrieve mailbox settings for a user, such as automatic reply configurations, time zones, and language preferences.
• How can I retrieve a user’s mailbox settings?
  To retrieve mailbox settings, use the following script:

  Get-MgUserMailboxSetting -UserId "<UserPrincipalName>"

• Can I fetch automatic reply settings using Get-MgUserMailboxSetting?
  Yes, you can retrieve automatic reply settings as part of the mailbox settings. Example:

  $MailboxSettings = Get-MgUserMailboxSetting -UserId "<UserPrincipalName>"
  $MailboxSettings.AutomaticRepliesSetting

• How can I export mailbox settings for multiple users to a CSV file?
  Prepare a list of users and use the following script to export their mailbox settings:

  $Users = @("user1@domain.com", "user2@domain.com")
  $Results = foreach ($User in $Users) {
          $MailboxSettings = Get-MgUserMailboxSetting -UserId $User
          [PSCustomObject]@{
                      UserPrincipalName = $User
                      Language = $MailboxSettings.Language
                      TimeZone = $MailboxSettings.TimeZone
                      AutomaticReplies = $MailboxSettings.AutomaticRepliesSetting.Status
                  }
          }
  $Results | Export-Csv -Path "C:\Path\To\MailboxSettings.csv" -NoTypeInformation

Conclusion

The Get-MgUserMailboxSetting cmdlet is an essential tool for administrators looking to manage and audit mailbox settings efficiently in a Microsoft 365 environment. Whether you are configuring new users or maintaining compliance standards, understanding how to utilize this cmdlet can save time and ensure your users have the correct mailbox configurations.

Incorporating it into your administrative routines not only enhances your control over user settings but also helps in mitigating risks associated with unauthorized mailbox changes.