This KB will show you how to connect to Office 365 Exchange Online using PowerShell
The requirements for this is Windows 7 SP1 and above or windows Server 2008 R2 and above.
Once done save code below as a .PS1 script:
#Connect 0365 $UserCredential = Get-Credential $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirectiong Import-PSSession $Session #script end
Once connected run the cmdlet below:
Get-Mailbox | Add-MailboxPermission -User simon-AccessRights fullaccess