Using Update-MgUserMailFolder in Graph PowerShell

The Update-MgUserMailFolder cmdlet in Microsoft Graph PowerShell allows administrators to update the properties of a mail folder for a specific user. This cmdlet is essential for managing email folder structures efficiently in an organization. This article provides detailed information on the cmdlet's syntax, usage examples, tips, use cases, and solutions to common errors.

Note: You need MailFolderId to work with this cmdlet. Use Get-MgUserMailFolder to get folder ID.


Cmdlet Syntax

Update-MgUserMailFolder -UserId <String> -MailFolderId <String> -BodyParameter <Hashtable>
  • -UserId: The unique identifier of the user (UPN or user ID).
  • -MailFolderId: The unique identifier of the mail folder to be updated.
  • -BodyParameter: A hashtable containing the properties to be updated.

Usage Examples

Example 1: Update a Folder within the Root Folder

To update a folder named "Projects" within the root folder:

$params = @{
    displayName = "Updated Projects"
}
Update-MgUserMailFolder -UserId "user@domain.com" -MailFolderId "AAMkAGIAAA" -BodyParameter $params

Example 2: Update Multiple Folders Programmatically with Error Handling

$folders = @(
    @{ MailFolderId = "AAMkAGIAAA"; NewName = "Updated Folder 1" }
    @{ MailFolderId = "AAMkAGIAAA/AAMkAGIAAA=="; NewName = "Updated Folder 2" }
)

foreach ($folder in $folders) {
    $params = @{
        displayName = $folder.NewName
    }
    try {
        Update-MgUserMailFolder -UserId "user@domain.com" -MailFolderId $folder.MailFolderId -BodyParameter $params
        Write-Host "Successfully updated folder: $($folder.NewName)"
    } catch {
        Write-Host "Failed to update folder: $($folder.NewName)"
        Write-Host "Error: $_"
    }
}

Example 3: Update Multiple Folders Using CSV with Error Handling

CSV File: folders.csv

MailFolderId,NewName
AAMkAGIAAA,Updated Folder 1
AAMkAGIAAA/AAMkAGIAAA==,Updated Folder 2

PowerShell Script:

$csv = Import-Csv -Path "C:\Path\To\folders.csv"

foreach ($row in $csv) {
    $params = @{
        displayName = $row.NewName
    }
    try {
        Update-MgUserMailFolder -UserId "user@domain.com" -MailFolderId $row.MailFolderId -BodyParameter $params
        Write-Host "Successfully updated folder: $($row.NewName)"
    } catch {
        Write-Host "Failed to update folder: $($row.NewName)"
        Write-Host "Error: $_"
    }
}

Cmdlet Tips

  • Always ensure that the -BodyParameter hashtable is correctly formatted according to the Microsoft documentation.
  • Use the -UserId parameter to specify the user whose mail folder you want to update.
  • Validate folder IDs before running the update script to avoid errors.

Use Cases

  1. Renaming Mail Folders for Better Organization:
    • Scenario: Users often create mail folders with generic names that make it difficult to organize emails effectively. Admins may need to rename these folders for users to improve mailbox organization.
    • Implementation: Use Update-MgUserMailFolder to rename mail folders to more meaningful names, such as renaming “Miscellaneous” to “Client Communications.”
    • Benefit: Enhances the user’s ability to manage their inbox more efficiently by improving the clarity and relevance of folder names, which makes email sorting and retrieval easier.

  2. Updating Folder Permissions for Delegated Mailboxes:
    • Scenario: In organizations where employees share mailboxes, folder permissions may need to be adjusted periodically as roles and responsibilities change.
    • Implementation: Use Update-MgUserMailFolder to adjust permissions on specific mail folders, granting or restricting access to certain users based on new organizational roles or changes in team composition.
    • Benefit: Ensures that only authorized individuals can access specific folders, improving security and allowing for better control over shared mailbox access.

  3. Optimizing Folder Structures for Large Mailboxes:
    • Scenario: Users with large mailboxes may have complex folder structures that need to be optimized for easier navigation and more effective email management.
    • Implementation: Use Update-MgUserMailFolder to rearrange or reorganize folder structures, such as consolidating related folders or creating new parent folders to group similar topics.
    • Benefit: Helps users manage large mailboxes more efficiently by making it easier to find and sort emails, reducing clutter and improving productivity.

  4. Standardizing Folder Names Across Departments:
    • Scenario: Some organizations require standardized folder structures for specific departments, ensuring consistency in how emails are managed across teams.
    • Implementation: Use Update-MgUserMailFolder to apply standardized folder names or structures across multiple users or departments, making it easier to enforce organizational policies for email management.
    • Benefit: Promotes uniformity in how teams organize their emails, making it easier for management to implement consistent communication workflows and reducing the risk of important emails being misplaced.

Possible Errors and Solutions

Error: Invalid MailFolderId

Cause: The provided MailFolderId does not exist or is incorrect.

Solution: Verify the MailFolderId by retrieving the folder information using the Get-MgUserMailFolder cmdlet.

Error: Access Denied

Cause: The user does not have permission to update the mail folder.

Solution: Ensure that the user has the necessary permissions to update the folder. Check the permissions and roles assigned to the user. Mail.ReadWrite is the required Graph API permission.

Error: The UserId is Incorrect

Cause: The -UserId parameter does not match any existing user.

Solution: Verify the -UserId parameter and ensure it matches the correct user identifier (UPN or user ID).

Error: Missing Required Parameter

Cause: The -BodyParameter hashtable is not correctly formatted.

Solution: Ensure that the -BodyParameter hashtable includes all required properties and follows the correct syntax.

Error: Invalid Property Values

Cause: The displayName property may contain invalid characters or exceed the character limit.

Solution: Ensure the displayName property contains valid characters and does not exceed the maximum length.


Conclusion

The Update-MgUserMailFolder cmdlet is a powerful tool for managing mail folders in Microsoft 365. By understanding its syntax, usage examples, and potential errors, administrators can effectively update mail folder properties to maintain an organized and efficient email structure. Strict adherence to the Microsoft documentation ensures successful execution and optimal results.


Additional Resources:

Microsoft Graph PowerShell Module Documentation
Microsoft Graph API Documentation

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