How to give 1 users access to evryones calendars in exch 2013

What is the command I need to run to give 1 user access to everyones calendars?
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Zac HarrisSystems Administrator Commented:
This should work for you:

Foreach ($mbx in get-mailbox){


Add-mailboxfolderpermission -identity $calendar -user username -AccessRights PublishingEditor


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vmichAuthor Commented:
Ok not sure what I am to type for this. Excuse my ignorance but can you explain?
Again it is one use so say the user name is Bob and he needs to access everyone calendars.
Zac HarrisSystems Administrator Commented:
You would use powershell.

Here is another command that will accomplish this for you as well

(Get-Mailbox).identity | foreach {Add-MailboxFolderPermission $_":\calendar" -User UserName -AccessRights reviewer -whatif}

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Change UserName to the user who needs the access and change the AccessRights as required.  When you are happy that it is correct remove the -whatif to run it.

Refer to the following link for an explanation on the different Access Rights levels:
Exchange Access RIghts

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vmichAuthor Commented:
Ok thanks I will give it a try and let you know...
vmichAuthor Commented:
that worked great... Thanks for the help
Zac HarrisSystems Administrator Commented:
Glad I could help you out! :)
vmichAuthor Commented:
run above powershell command
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