Mailbox permission in Exchange Online can enhance email communication within an organization. However, excessive mailbox permissions to a suspicious user could lead to data breaches or compromised security. In this guide, we will walk you through the simple steps to export mailbox permission report in Microsoft 365.
Windows PowerShell Connect-ExchangeOnline Windows PowerShell Get-Mailbox | Get-MailboxPermission|?{$_.User -ne 'nt authority\self'} |Select-Object Identity,User,AccessRights Windows PowerShell Get-Mailbox | Get-RecipientPermission | where {($_.Trustee -ne 'nt authority\self') -and ($_.Trustee -ne 'Null sid')} | select Identity,Trustee,AccessRights Windows PowerShell Get-Mailbox |?{$_.GrantSendOnBehalfTo -ne $null }| Select PrimarySmtpAddress,GrantSendOnBehalfTo,RecipientTypeDetails 
AdminDroid's Exchange Online reporter offers accurate mailbox permission details and other useful mailbox related reports. It allows you to effortlessly visualize user access rights, track permission changes, and ensure secure mailbox management. Also, you can easily identify any potential security risks, enhancing overall mailbox access management.
Monitor guests access to other mailboxes to ensure secure collaboration and data protection in your Exchange Online environment.
Manage external email forwarding in Microsoft 365 with in-depth details and prevent any unauthorized data leaks and security breaches.
Monitor non-owner mailbox access report in Exchange Online to identify and address any sensitive actions by delegated users promptly.
Effortlessly visualize and manage Exchange Online mailbox access rights across your organization with AdminDroid's mailbox permissions dashboard.
Manage Microsoft 365 mobile devices accessing Exchange online mailboxes using AdminDroidâs mailbox device management reporting that includes OS version, device policy, etc.
Mailbox permission management also includes monitoring shared mailbox permissions and promptly detect any unapproved permissions in the Exchange Online shared mailboxes.
In conclusion, AdminDroid empowers admins with unmatched capabilities in Exchange Online mailbox permissions reporting and various mailbox-related insights. Its user-friendly reports provide a comprehensive overview that enables admins to efficiently manage and optimize mailbox-related operations within the Microsoft 365 environment.
This error occurs when the mailbox type is not specified in the cmdlet. Scanning all mailboxes in the organization can take time and give this error.
Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited | Get-MailboxPermission âUser <UPN>This error occurs when you try to give folder permission for a password expired user mailbox.
This error occurs when you enter incorrect or non-existing folder name in the "Get-MailboxFolderPermission" cmdlet.
Get-MailboxFolderPermission -Identity <UPN>:\InboxThis error occurs when you try to run the 'Get-MailboxPermission' without proper admin priveleges.
Connect-ExchangeOnlineThis error occurs when the delegate user is not assigned with active Exchange Online license.
Effectively managing permissions for recipients in Exchange Online is crucial for maintaining a secure and organized email communication system. It involves assigning appropriate mailbox access rights to legitimate recipients, ensuring streamlined collaboration and minimizing the risk of unauthorized access or data breaches.
You can follow the below PowerShell cmdlets to give mailbox permissions to another Microsoft 365 user.
To give 'Full Access' permission for a user to a mailbox, you can run the below command:
Add-MailboxPermission <User Mailbox> -User <Identity> -AccessRights FullAccess -InheritanceType AllYou can run the below command to give 'Send As' permission for a specific user to a mailbox:
Add-RecipientPermission <User Mailbox> -AccessRights SendAs -Trustee <Identity> -Confirm:$falseTo delegate 'Send on Behalf' permission for a user to a mailbox, you can run the below command:
Set-Mailbox <User Mailbox> -GrantSendOnBehalfTo <Identity>Track and detect who modified mailbox permissions in Microsoft 365!
Unapproved permission changes in Exchange Online mailboxes could lead to potential security issues such as data leaks in sensitive business email conversations, customer details, and more. Regular monitoring of mailbox permission changes in Microsoft 365 is essential for managing mailbox access rights. Also, it helps to identify and track excessive and unnecessary permissions effectively.
Mailbox permission monitoring involves understanding the mailboxes a user can access in Microsoft 365. It helps you to efficiently resolve Exchange Online mailbox access issues and ensures that sensitive information remains accessible only to authorized individuals.
In Exchange Online admin center, you can get delegated permissions for a list of all Exchange Online mailboxes. However, getting specific user access rights is a time-consuming task.
You can get all Exchange Online mailboxes to which a user has 'Full Access' permissions using the below PowerShell cmdlet:
Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited | Get-MailboxPermission âUser <UPN>Utilize the below PowerShell cmdlet to obtain list of mailboxes to which a user has 'Send As' permissions:
Get-Mailbox -RecipientTypeDetails UserMailbox -ResultSize Unlimited | Get-RecipientPermission âTrustee <UPN>Since SendOnBehalf permission is not classified under the 'Mailbox permission' parameter, PowerShell cannot list all mailboxes for a given user with this permission. Also, these PowerShell commands require additional steps to export mailbox permissions to CSV, which can be time-consuming.
Therefore, weâve crafted the unified script to effortlessly export list of mailboxes to which a specific user has 'Full Access', 'Send As', 'Send on Behalf' permissions.
Download MailboxesUserCanAccess.ps1 and run the script in Administrator PowerShell with ".\MailboxesUserCanAccess.ps1 -UPN <user@contoso.com> -SendOnBehalf" parameter to export list of mailboxes to CSV to which a specific user has 'SendOnBehalf' permission.
TIP: AdminDroidâs AI powered graphs enable you to get a list of mailboxes a user can access and the distribution of access rights within those mailboxes.
Mailbox permissions and mailbox folder permissions are distinct concepts in Microsoft 365.
Understanding this difference is crucial for managing Exchange Online mailbox access effectively. Also, monitoring Exchange Online mailbox folder permissions ensures the security and privacy of mailbox contents.
You can "add" mailbox folder permissions using the below PowerShell cmdlet:
Add-MailboxFolderPermission -Identity <UserUPN>:\<FolderName> -User <DelegatedUserUPN> -AccessRights <RolesOrPermissions>You can "get" mailbox folder permissions of required users using the below PowerShell cmdlet:
Get-MailboxFolderPermission -Identity <UserUPN>:\<FolderName>Also, it is necessary to monitor users who grant access to specific mailbox folders, preventing any unwanted changes to mailbox folder permissions. It helps to enhance mailbox security at folder level and enhances overall Exchange Online management.
With AdminDroid advanced alerting, you can configure threshold limits for folder permission changes and receive real-time notifications whenever there is an unusual activity in Exchange Online mailbox folders.
PRO TIP: With the 'Authorized by' graph you can get detailed information on specific users granting folder permissions to other Microsoft 365 users. This provides a comprehensive overview of authorization activities, enabling efficient monitoring of folder permissions across your organization.
Exporting mailbox permissions to CSV in Microsoft 365 is very helpful for admins, especially when managing multiple mailbox permissions across various users and groups. It enables admins to efficiently analyze and manage permissions, ensuring that the right users have appropriate access to mailbox and its data.
However, Microsoft 365 admins cannot export mailbox permissions for multiple users as the export option is not available in the native solution. This limitation makes it challenging to monitor and manage multiple users' Exchange Online mailbox permissions.
Using AdminDroid, admins can easily export mailbox permissions to CSV and other various formats such as HTML, PDF, XLS, and XLSX.
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