diff --git a/live/admin.py b/live/admin.py
index d52586e..82651c4 100644
--- a/live/admin.py
+++ b/live/admin.py
@@ -15,8 +15,8 @@ class InstanceAdmin(admin.ModelAdmin):
     Custom User admin settings.
     """
     list_display = ('user', 'instance_auth_type', 'name', 'description',
-                    'instance_status', 'created_at', 'last_modified', 'hash')
-    search_fields = ('name', 'description', 'user__username', 'hash', 'instance_auth_type')
+                    'instance_status', 'created_at', 'last_modified', 'hash', 'allowed_domains')
+    search_fields = ('name', 'description', 'user__username', 'hash', 'instance_auth_type', 'allowed_domains')
     list_filter = ('instance_status', 'created_at', 'last_modified', 'user')
     ordering = ('-created_at',)
     readonly_fields = ('hash', 'created_at', 'last_modified')
diff --git a/live/migrations/0014_instance_alloweddomains.py b/live/migrations/0014_instance_alloweddomains.py
new file mode 100644
index 0000000..4292d65
--- /dev/null
+++ b/live/migrations/0014_instance_alloweddomains.py
@@ -0,0 +1,17 @@
+# Generated by Django 5.0.6 on 2024-09-12 20:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("live", "0013_alter_socialuser_username_and_more"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="instance",
+            name="allowedDomains",
+            field=models.JSONField(blank=True, null=True),
+        ),
+    ]
diff --git a/live/migrations/0015_alter_socialuser_username.py b/live/migrations/0015_alter_socialuser_username.py
new file mode 100644
index 0000000..0af9266
--- /dev/null
+++ b/live/migrations/0015_alter_socialuser_username.py
@@ -0,0 +1,17 @@
+# Generated by Django 5.0.6 on 2024-09-12 20:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("live", "0014_instance_alloweddomains"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="socialuser",
+            name="username",
+            field=models.CharField(default={"all"}, max_length=100),
+        ),
+    ]
diff --git a/live/migrations/0016_alter_instance_alloweddomains_and_more.py b/live/migrations/0016_alter_instance_alloweddomains_and_more.py
new file mode 100644
index 0000000..d22b691
--- /dev/null
+++ b/live/migrations/0016_alter_instance_alloweddomains_and_more.py
@@ -0,0 +1,22 @@
+# Generated by Django 5.0.6 on 2024-09-12 20:22
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("live", "0015_alter_socialuser_username"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="instance",
+            name="allowedDomains",
+            field=models.JSONField(blank=True, default=["*"], null=True),
+        ),
+        migrations.AlterField(
+            model_name="socialuser",
+            name="username",
+            field=models.CharField(default="", max_length=100),
+        ),
+    ]
diff --git a/live/migrations/0017_rename_alloweddomains_instance_allowed_domains.py b/live/migrations/0017_rename_alloweddomains_instance_allowed_domains.py
new file mode 100644
index 0000000..331db8e
--- /dev/null
+++ b/live/migrations/0017_rename_alloweddomains_instance_allowed_domains.py
@@ -0,0 +1,17 @@
+# Generated by Django 5.0.6 on 2024-09-12 20:24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("live", "0016_alter_instance_alloweddomains_and_more"),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name="instance",
+            old_name="allowedDomains",
+            new_name="allowed_domains",
+        ),
+    ]
diff --git a/live/migrations/0018_alter_instance_allowed_domains.py b/live/migrations/0018_alter_instance_allowed_domains.py
new file mode 100644
index 0000000..76e1787
--- /dev/null
+++ b/live/migrations/0018_alter_instance_allowed_domains.py
@@ -0,0 +1,20 @@
+# Generated by Django 5.0.6 on 2024-09-12 21:09
+
+import live.models
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("live", "0017_rename_alloweddomains_instance_allowed_domains"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="instance",
+            name="allowed_domains",
+            field=models.JSONField(
+                blank=True, default=live.models.default_allowed_domains, null=True
+            ),
+        ),
+    ]
diff --git a/live/models.py b/live/models.py
index 9751fef..bccfe47 100644
--- a/live/models.py
+++ b/live/models.py
@@ -13,6 +13,11 @@
 User = get_user_model()
 
 
+# TO DO: A better way to initialize the default value for allowed_domains.
+def default_allowed_domains():
+    return ["*"]
+
+
 TYPE_CHOICES = (
         (0x1 << 0, 'Open to All'),
         (0x1 << 1, 'Open within Ogranization'),
@@ -40,6 +45,7 @@ class Instance(models.Model):
     - name: Name of the instance, required.
     - description: Description of the instance, required.
     - instance_status: Status of the instance, required.
+    - allowed_domains: List of allowed email domains for the instance.
     - created_at: Timestamp of the instance creation.
     - last_modified: Timestamp of the last modification of the instance.
     - hash: Unique hash for the instance object.
@@ -50,6 +56,7 @@ class Instance(models.Model):
     name = models.CharField(max_length=100)
     description = models.TextField()
     instance_status = models.IntegerField(choices=STATUS_CHOICES, default=0x1 << 1)
+    allowed_domains = models.JSONField(null=True, blank=True, default=default_allowed_domains)
     created_at = models.DateTimeField(auto_now_add=True)
     last_modified = models.DateTimeField(auto_now=True)
     hash = models.CharField(max_length=16, unique=True, editable=False)
@@ -80,6 +87,12 @@ def getExistingInstance(hash):
         """
         return Instance.objects.get(hash=hash)
 
+    def getAllowedDomains(hash):
+        """
+        Get the allowed domains for the instance.
+        """
+        return Instance.objects.get(hash=hash).allowed_domains
+
 
 class SocialUser(models.Model):
     """
diff --git a/live/serializers.py b/live/serializers.py
index 49e906c..349409e 100644
--- a/live/serializers.py
+++ b/live/serializers.py
@@ -21,7 +21,7 @@ class InstanceSerializer(serializers.ModelSerializer):
     class Meta:
         model = Instance
         fields = ['user', 'instance_auth_type', 'name', 'description', 'instance_status',
-                  'created_at', 'last_modified', 'hash']
+                  'created_at', 'last_modified', 'hash', 'allowed_domains']
         read_only_fields = ['hash', 'created_at', 'last_modified', 'user']
 
     def create(self, validated_data):
@@ -116,6 +116,9 @@ def get_or_create_social_user(self, user):
         Create a social user if it doesn't exist or return the existing one.
         """
         instance = Instance.getExistingInstance(self.context.get("hash"))
+        allowed_domains = instance.allowed_domains
+        if allowed_domains != ["*"] and user.email.split("@")[1] not in allowed_domains:
+            raise serializers.ValidationError("User email domain is not allowed.")
         try:
             social_user = SocialUser.objects.get(username=user.email)
         except SocialUser.DoesNotExist:
diff --git a/live/views.py b/live/views.py
index 175ac23..0449a9c 100644
--- a/live/views.py
+++ b/live/views.py
@@ -454,7 +454,7 @@ def get(self, request, *args, **kwargs):
         redirect_uri = request.GET.get("redirect_uri")
         if redirect_uri not in settings.SOCIAL_AUTH_ALLOWED_REDIRECT_URIS:
             return Response(
-                "redirect_uri must be in SOCIAL_AUTH_ALLOWED_REDIRECT_URIS",
+                data={"detail": "Invalid redirect URI"},
                 status=status.HTTP_400_BAD_REQUEST,
             )
         strategy = load_strategy(request)