diff --git a/src/CommonLib/LDAPUtilsNew.cs b/src/CommonLib/LDAPUtilsNew.cs
index 1586db8f..66c90b42 100644
--- a/src/CommonLib/LDAPUtilsNew.cs
+++ b/src/CommonLib/LDAPUtilsNew.cs
@@ -237,7 +237,7 @@ private bool GetCachedConnection(string domain, bool globalCatalog, out LdapConn
         
         if (GetDomainSidFromDomainName(domain, out var domainSid))
         {
-            if (_ldapConnectionCache.TryGet(_ldapConfig.Server, globalCatalog, out connection))
+            if (_ldapConnectionCache.TryGet(domainSid, globalCatalog, out connection))
             {
                 return true;
             }