diff --git a/internal/outpost/ldap/instance_search.go b/internal/outpost/ldap/instance_search.go
index 657ecce67..31c588a79 100644
--- a/internal/outpost/ldap/instance_search.go
+++ b/internal/outpost/ldap/instance_search.go
@@ -122,6 +122,10 @@ func (pi *ProviderInstance) UserEntry(u api.User) *ldap.Entry {
 			Name:   "cn",
 			Values: []string{u.Username},
 		},
+		{
+			Name:   "sAMAccountName",
+			Values: []string{u.Username},
+		},
 		{
 			Name:   "uid",
 			Values: []string{u.Uid},