Microsoft Exchange Server 2016 PowerShell Cookbook - Fourth Edition

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If you want to use explicit credentials when creating your ExchangeService object rather than using the credentials of the currently logged on user, you need to do a couple of things differently. The following code will create an instance of the ExchangeService class using an alternate set of credentials:

[System.Reflection.Assembly]::LoadFile( 
  "C:\ews\Microsoft.Exchange.WebServices.dll" 
) 
$svc = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService 
$svc.Credentials = New-Object ` 
Microsoft.Exchange.WebServices.Data.WebCredentials ` 
-ArgumentList "jonand","P@ssw0rd01","testlabs.se" 

In addition, you also have the option of setting the EWS URL manually:

    $url =  "https://autodiscover.testlabs.se/EWS/Exchange.asmx" ...