Exchange 2010 permissions

Hi Experts, our CEO has just made a request to be able to view everyones calendars, tasks, mailboxes etc. I have tried adding him to Recipient Management, Organisation Management and even Server Management but when he tries to open Outlook calendars for other users he is told he has no permissions.

I have tried doing it in Active Directory and the Exchange Site to no avail. I have also recreated the profile and toggled Cached Exchange mode and that hasnt helped either

Any ideas?
David CIT Projects ManagerAsked:
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Mahmoud SabrySenior IT Systems EngineerCommented:
grant your manager full access to all mailboxes, you can do this from exchange management shell in one command
Mahmoud SabrySenior IT Systems EngineerCommented:
for example you can use the below cmdlet

get-mailbox  | Add-MailboxPermission -User ”Your_CEO” -AccessRights ‘FullAccess’

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David CIT Projects ManagerAuthor Commented:
Thank you very much that works! Is there a way of doing via GUI?
Mahmoud SabrySenior IT Systems EngineerCommented:
thanks for the points, for GUI you can do it user by user only
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