Office 2013 Unlicensed Product Error

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• SBS 2011 error 550 5.7.1 External client with IP address 89.204.216.202 does not have permissions to submit to this server.

  https://docs.microsoft.com/en-us/previous-versions/office/exchange-server-2007/bb851513(v=exchg.80)

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• Exchange Online Powershell Add / Remove delegated mailbox

  Connect to Exchange Online PowerShell https://docs.microsoft.com/en-us/powershell/exchange/exchange-online/connect-to-exchange-online-powershell/connect-to-exchange-online-powershell?view=exchange-ps Set-ExecutionPolicy RemoteSigned $UserCredential = ...