Grant or Deny Mailbox Permissions to a User or Group
You can grant or deny permissions for a mailbox-enabled user, or mail-enabled user or group, that enables them to access another's mailbox. This is helpful when you want to enable a user or group to have permissions to another's mailbox. For example, you can give a mailbox-enabled user send as permissions to another user's mailbox; or you can deny a mail-enabled group from reading permissions of an existing user.
Note You can remove a mailbox-enabled user, or mail-enabled user or group, from Name on the Mailbox Rights tab. However, if you think you might grant the user or group permissions to this mailbox in the future, deny the user or group permissions to access the mailbox instead of removing them from Name.
To grant or deny mailbox permissions:
Related TopicsConfigure Advanced Message Settings for Mailbox-Enabled Users Only