open a mailbox to which I have full access

Question

I can open my mailbox in exchange online with EWS and Powershell

$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService  
$service.Credentials = New-Object System.Net.NetworkCredential -ArgumentList $mail, $password
$service.URL = New-Object Uri("https://outlook.office365.com/EWS/Exchange.asmx")  
$view = New-Object Microsoft.Exchange.WebServices.Data.ItemView($numOfEmailsToRead, $index)
$folderview = New-Object Microsoft.Exchange.WebServices.Data.FolderView(10)
$folderview.PropertySet = New-Object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.Webservices.Data.BasePropertySet]::FirstClassProperties)
$folderview.PropertySet.Add([Microsoft.Exchange.Webservices.Data.FolderSchema]::DisplayName)
$folderview.Traversal = [Microsoft.Exchange.Webservices.Data.FolderTraversal]::Deep
$folderfindResults = $service.FindFolders([Microsoft.Exchange.Webservices.Data.WellKnownFolderName]::Inbox, $folderview)
$SearchFilterContainsSubString = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Subject, $Paramerter)
$SearchFilterNot = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+Not($SearchFilterContainsSubString)
foreach ($InboxFolder in $folderfindResults) {

  $findResultsItems = $InboxFolder.findItems($SearchFilterNot,$view)}

How do I change the code to open a mailbox to which I have full access?

Answer 1

In your example you need to use the Mailbox overload for Folder id so change

        $folderfindResults = $service.FindFolders([Microsoft.Exchange.Webservices.Data.WellKnownFolderName]::Inbox, $folderview)
    $SearchFilterContainsSubString = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Subject, $Paramerter)
    $SearchFilterNot = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+Not($SearchFilterContainsSubString)
    foreach ($InboxFolder in $folderfindResults) {

    $findResultsItems = $InboxFolder.findItems($SearchFilterNot,$view)}

To

    $MailboxToAccess = "blah@blah.com"   
    $folderid = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Inbox,$MailboxToAccess)     
    $folderfindResults = $service.FindFolders($folderid, $folderview)
    $SearchFilterContainsSubString = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+ContainsSubstring([Microsoft.Exchange.WebServices.Data.ItemSchema]::Subject, $Paramerter)
    $SearchFilterNot = New-Object Microsoft.Exchange.WebServices.Data.SearchFilter+Not($SearchFilterContainsSubString)
    foreach ($InboxFolder in $folderfindResults) {

    $findResultsItems = $InboxFolder.findItems($SearchFilterNot,$view)}