diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 23c5a98a2..42dd8424e 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -17,6 +17,10 @@ Unreleased
 ----------
 * nothing unreleased
 
+[5.6.3]
+--------
+* feat: exclude unlinked member records from enterprise-customer-members and enterprise_group endpoints
+
 [5.6.2]
 --------
 * fix: Add dry_run_mode_enabled field to SAP admin panel
diff --git a/enterprise/__init__.py b/enterprise/__init__.py
index c283d5e50..a613a3380 100644
--- a/enterprise/__init__.py
+++ b/enterprise/__init__.py
@@ -2,4 +2,4 @@
 Your project description goes here.
 """
 
-__version__ = "5.6.2"
+__version__ = "5.6.3"
diff --git a/enterprise/api/v1/views/enterprise_customer_members.py b/enterprise/api/v1/views/enterprise_customer_members.py
index 4a41965cc..e850de6d0 100644
--- a/enterprise/api/v1/views/enterprise_customer_members.py
+++ b/enterprise/api/v1/views/enterprise_customer_members.py
@@ -102,7 +102,10 @@ def get_members(self, request, *args, **kwargs):
                 FROM enterprise_enterprisecustomeruser ecu
                 INNER JOIN auth_user as au on ecu.user_id = au.id
                 LEFT JOIN auth_userprofile as aup on au.id = aup.user_id
-                WHERE ecu.enterprise_customer_id = %s
+                WHERE
+                    ecu.enterprise_customer_id = %s
+                AND
+                    ecu.linked = 1
             ) SELECT * FROM users {user_query_filter} ORDER BY full_name;
         """
         try:
diff --git a/enterprise/models.py b/enterprise/models.py
index 0eaa1f889..5d588eac3 100644
--- a/enterprise/models.py
+++ b/enterprise/models.py
@@ -4707,7 +4707,10 @@ def _get_filtered_ecu_ids(self, user_query):
                 from enterprise_enterprisecustomeruser ecu
                 inner join auth_user au on ecu.user_id = au.id
                 left join auth_userprofile aup on au.id = aup.user_id
-                where ecu.enterprise_customer_id = %s
+                where
+                    ecu.enterprise_customer_id = %s
+                and
+                    ecu.linked = 1
             ) select id from users where email like %s or full_name like %s;
         """
         # Raw sql is picky about uuid format