diff --git a/app/classes/oidc/CoreIDAdapter.js b/app/classes/oidc/CoreIDAdapter.js
index ec4eaa6..63e0583 100644
--- a/app/classes/oidc/CoreIDAdapter.js
+++ b/app/classes/oidc/CoreIDAdapter.js
@@ -49,7 +49,7 @@ class CoreIDAdapter {
 
     async findByUid(uid) {
         const result = await this.coll().find(
-            { 'payload.uid': uid.toLowerCase() },
+            { 'payload.uid': uid },
             { payload: 1 },
         ).limit(1).next()