diff --git a/Binoculars.ps1 b/Binoculars.ps1
index 285f631..7c2d8d2 100644
--- a/Binoculars.ps1
+++ b/Binoculars.ps1
@@ -477,6 +477,7 @@ function Invoke-BinocularsParallelDomainControllerHealthCheck {
 function Resolve-BinocularsIdentity {
     param(
         [Parameter(Mandatory)]
+        [AllowEmptyString()]
         [string]$UserInput
     )