Fixed issue when checking objects from child and tree domain

The main objects that we care about should be in the root of the forest which is where the Root Domain Naming Context should be set to. This should always work if the script is run in a domain joined computer.

Setup/SetupAssist/Checks/Test-ValidHomeMdb.ps1

@@ -3,7 +3,10 @@
 
 Function Test-ValidHomeMDB {
     $filePath = "$PSScriptRoot\validHomeMdb.txt"
-    ldifde -t 3268 -r "(&(objectClass=user)(mailnickname=*)(!(msExchRemoteRecipientType=*))(!(targetAddress=*))(msExchHideFromAddressLists=TRUE)(!(cn=HealthMailbox*)))" -l "distinguishedName,homeMDB" -f $filePath | Out-Null
+    $rootDSE = [ADSI]("LDAP://RootDSE")
+    ldifde -t 3268 -r "(&(objectClass=user)(mailnickname=*)(!(msExchRemoteRecipientType=*))(!(targetAddress=*))(msExchHideFromAddressLists=TRUE)(!(cn=HealthMailbox*)))" `
+        -l "distinguishedName,homeMDB" -f $filePath -d $rootDSE.rootDomainNamingContext | Out-Null
+
     $ldifeObject = @(Get-Content $filePath | ConvertFrom-Ldif)
 
     if ($ldifeObject.Count -gt 0) {