diff --git a/src/resources/users.tsx b/src/resources/users.tsx
index 644385e..65c877e 100644
--- a/src/resources/users.tsx
+++ b/src/resources/users.tsx
@@ -189,7 +189,7 @@ export const UserList = (props: ListProps) => (
 // here only local part of user_id
 // maxLength = 255 - "@" - ":" - storage.getItem("home_server").length
 // storage.getItem("home_server").length is not valid here
-const validateUser = [required(), maxLength(253), regex(/^[a-z0-9._=\-/]+$/, "synapseadmin.users.invalid_user_id")];
+const validateUser = [required(), maxLength(253), regex(/^[a-z0-9._=\-\+/]+$/, "synapseadmin.users.invalid_user_id")];
 
 const validateAddress = [required(), maxLength(255)];
 
diff --git a/src/utils/mxid.ts b/src/utils/mxid.ts
index f5651b8..a46e266 100644
--- a/src/utils/mxid.ts
+++ b/src/utils/mxid.ts
@@ -41,7 +41,6 @@ export function returnMXID(input: string | Identifier): string {
   const homeserver = localStorage.getItem("home_server");
 
   // Check if the input already looks like a valid MXID (i.e., starts with "@" and contains ":")
-  const mxidPattern = /^@[^@:]+:[^@:]+$/;
   if (isMXID(input)) {
     return input as string; // Already a valid MXID
   }