Test-EWSEndpoints.ps1

# Syntax:
# Test-EWSEndpoints someuser@contoso.com

param($emailAddress)

Import-Module -Name "C:\Program Files\Microsoft\Exchange\Web Services\2.2\Microsoft.Exchange.WebServices.dll"

$urls = New-Object 'System.Collections.Generic.List[string]'

# Update these URLs to reflect the URLs you want to test
$urls.Add("https://e16srv1.contoso.com/ews/exchange.asmx")
$urls.Add("https://e15srv1.contoso.com/ews/exchange.asmx")
$urls.Add("https://e14mb1.contoso.com/ews/exchange.asmx")
$urls.Add("https://e14mb2.contoso.com/ews/exchange.asmx")

foreach ($url in $urls)
{
    $exchService = new-object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2010)
    "Using EWS URL: " + $url
    $exchService.Url = new-object System.Uri($url)
    $exchService.UseDefaultCredentials = $true
    $mbx = new-object Microsoft.Exchange.WebServices.Data.Mailbox($emailAddress)
    $inboxFolderName = [Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Inbox
    $inboxId = new-object Microsoft.Exchange.WebServices.Data.FolderId($inboxFolderName, $mbx)

    try {
        $inboxFolder = [Microsoft.Exchange.WebServices.Data.Folder]::Bind($exchService, $inboxId)
        "Opened mailbox: " + $mbx
        "Items in inbox: " + $inboxFolder.TotalCount
    }
    catch {
        "Error. Could not open mailbox"
    }

    ""
}