How to give permission on user’s mailbox in Exchange 2007,2010 Using Powershell

Add-MailboxPermission -Identity “User Display Name” -User “DomainAlias” -AccessRights FullAccess

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Add-MailboxPermission -Identity “User Display Name” -User “DomainAlias” -AccessRights Editor

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Add-MailboxPermission -Identity “User Display Name” -User “DomainAlias” -AccessRights Author

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Add-MailboxPermission -Identity JeroenC -User ‘Mark Steele’ -AccessRight FullAccess -InheritanceType All -Automapping $false

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Add-MailboxPermission -Identity “Tony Smith” -User “Ayla Kol” -AccessRights ReadPermission