To more understand the AccessRights in Mailbox permission

Question

Can you explain the specific roles and implications of the following mailbox permission AccessRights values: ChangeOwner, ChangePermission, DeleteItem, ExternalAccount, and ReadPermission?

ChangeOwner: What does this permission enable a user to do in terms of changing the ownership of mailbox items or folders? How does it impact administrative control and delegation within the mailbox?

ChangePermission: What is the effect of this permission on modifying access rights for mailbox items or folders? In what scenarios is it necessary to grant this permission?

DeleteItem: How does this permission affect the ability to delete items within a mailbox? Are there any constraints or additional considerations associated with it?

ExternalAccount: What does this permission allow, particularly in relation to external accounts or access? How does it differ from other permissions and what are its typical use cases?

ReadPermission: What level of access does this permission provide for reading mailbox items or folders? How does it interact with other permissions, and when is it essential to grant this access?

Answer 1

Hi, @Ajay m

Welcome to the Microsoft Q&A platform!

Below I will give you a detailed description of the specific role and meaning of each parameter.

ChangeOwner: This permission allows the user to change the owner of the mailbox. This means that users can change the owner metadata of an item or folder to themselves or another user. Granting this permission can have a significant impact on administrative control, as ownership often determines who has ultimate control over an item or folder. Typically, this is an advanced privilege that is used in administrative tasks, such as when ownership is reassigned due to a role change or organizational reorganization.

 

ChangePermission: This permission enables the user to modify access to a mailbox item or folder. This permission must be granted when a user needs to manage who can access or modify mailbox content. This permission is required in situations where delegated control is required, such as in a collaborative environment, where users need to manage who has access to certain mailbox items or folders. This permission is often required by administrators to maintain appropriate access controls and ensure that only authorized users have access to sensitive information.

 

DeleteItem: This permission allows users to delete items within a mailbox, which includes emails, calendar events, tasks, and other mailbox content. It's important to note that accidental or unauthorized deletions can occur, so you should be cautious about granting this permission, usually only to trusted users, to ensure that users can manage and clean up mailbox contents, but also to guard against the risk of accidental deletion.

 

ExternalAccount: This permission indicates that the accounts are not in the same domain. It allows external accounts to access mailboxes, which is useful for cross-domain collaboration or when external consultants need access. This permission differs from other permissions in that it focuses on access from accounts that are not the primary organization or domain. It's especially useful for granting access to third-party services or users outside your organization for collaboration or interoperability purposes.

 

ReadPermission: This permission provides the ability to read a mailbox item or folder, which is a basic level of access that often coexists with other permissions, such as Write or DeleteItem. This access must be granted when a user needs to view content without making changes, such as during a review or moderation process.

 

Granting and managing these permissions requires an understanding of what they mean and the specific needs of your organization or team. Always ensure that permissions are granted in accordance with the principle of least privilege to minimize security risks.

In addition, the following permissions are assigned to user mailboxes:

More information can be found Get-EXOMailboxPermission (ExchangePowerShell) | Microsoft Learn

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