diff --git a/authentik/core/api/users.py b/authentik/core/api/users.py
index c4d1f6bb9..9b0fc38d8 100644
--- a/authentik/core/api/users.py
+++ b/authentik/core/api/users.py
@@ -42,6 +42,7 @@ class UserSerializer(ModelSerializer):
     avatar = CharField(read_only=True)
     attributes = JSONField(validators=[is_dict], required=False)
     groups = ListSerializer(child=GroupSerializer(), read_only=True, source="ak_groups")
+    uid = CharField(read_only=True)
 
     class Meta:
 
@@ -57,6 +58,7 @@ class UserSerializer(ModelSerializer):
             "email",
             "avatar",
             "attributes",
+            "uid",
         ]
 
 
diff --git a/outpost/pkg/ldap/instance_search.go b/outpost/pkg/ldap/instance_search.go
index 15bc352f7..4e5665adc 100644
--- a/outpost/pkg/ldap/instance_search.go
+++ b/outpost/pkg/ldap/instance_search.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"net"
-	"strconv"
 	"strings"
 
 	"github.com/nmcclain/ldap"
@@ -79,7 +78,7 @@ func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest,
 				},
 				{
 					Name:   "uid",
-					Values: []string{strconv.Itoa(int(u.Pk))},
+					Values: []string{u.UID},
 				},
 				{
 					Name:   "name",
diff --git a/swagger.yaml b/swagger.yaml
index 039f99cbf..506ea0868 100755
--- a/swagger.yaml
+++ b/swagger.yaml
@@ -15395,6 +15395,11 @@ definitions:
       attributes:
         title: Attributes
         type: object
+      uid:
+        title: Uid
+        type: string
+        readOnly: true
+        minLength: 1
   Token:
     required:
       - identifier