diff --git a/src/backend/core/admin.py b/src/backend/core/admin.py
index 9bd14e7..60260f4 100644
--- a/src/backend/core/admin.py
+++ b/src/backend/core/admin.py
@@ -4,6 +4,8 @@ from django.contrib import admin
 from django.contrib.auth import admin as auth_admin
 from django.utils.translation import gettext_lazy as _
 
+from mailbox_manager.admin import MailDomainAccessInline
+
 from . import models
 
 
@@ -65,7 +67,7 @@ class UserAdmin(auth_admin.UserAdmin):
             },
         ),
     )
-    inlines = (TeamAccessInline,)
+    inlines = (TeamAccessInline, MailDomainAccessInline)
     list_display = (
         "sub",
         "email",
diff --git a/src/backend/mailbox_manager/admin.py b/src/backend/mailbox_manager/admin.py
index 17d0147..de13bc6 100644
--- a/src/backend/mailbox_manager/admin.py
+++ b/src/backend/mailbox_manager/admin.py
@@ -34,6 +34,15 @@ class MailDomainAccessAdmin(admin.ModelAdmin):
     )
 
 
+class MailDomainAccessInline(admin.TabularInline):
+    """Inline admin class for mail domain accesses."""
+
+    extra = 0
+    autocomplete_fields = ["user", "domain"]
+    model = models.MailDomainAccess
+    readonly_fields = ("created_at", "updated_at")
+
+
 @admin.register(models.Mailbox)
 class MailboxAdmin(admin.ModelAdmin):
     """Admin for mailbox model."""