diff --git a/src/services/ldap-directory.service.ts b/src/services/ldap-directory.service.ts
index 21955706..513a3783 100644
--- a/src/services/ldap-directory.service.ts
+++ b/src/services/ldap-directory.service.ts
@@ -356,9 +356,10 @@ export class LdapDirectoryService implements DirectoryService {
         const p1 = arr.slice(0, 4).reverse().buffer;
         const p2 = arr.slice(4, 6).reverse().buffer;
         const p3 = arr.slice(6, 8).reverse().buffer;
-        const p4 = arr.slice(8).buffer;
+        const p4 = arr.slice(8, 10).buffer;
+        const p5 = arr.slice(10).buffer;
         const guid = Utils.fromBufferToHex(p1) + '-' + Utils.fromBufferToHex(p2) + '-' + Utils.fromBufferToHex(p3) +
-            '-' + Utils.fromBufferToHex(p4);
+            '-' + Utils.fromBufferToHex(p4) + '-' + Utils.fromBufferToHex(p5);
         return guid.toLowerCase();
     }
 }