This quick, easy to follow guide will help you to grant full-access permissions to an O365 mailbox in minutes.

     

    To get started open a remote session using this PowerShell:

     

    $o365cred=get-credential
    $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $o365cred -Authentication Basic -AllowRedirection
    Import-PSSession $session

     

    In our first example, we’ll delegate full access  to a single mailbox. In this case, so that Jim has full access to Billy’s mailbox:

     

    Add-MailboxPermission -identity jim@mycoolsite.com -user billy@mycoolsite.com -AccessRights FullAccess

     

    In this example, we’ll give Jim full access to all mailboxes in the organization:

     

    Get-Mailbox | Add-mailboxpermission -user Jim@mycoolsite.com -AccessRights FullAccess

     

    And that’s it, you’re done!

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