diff --git a/source/auth/auth_sam.c b/source/auth/auth_sam.c
index 80e02c3..57e16d9 100644
--- a/source/auth/auth_sam.c
+++ b/source/auth/auth_sam.c
@@ -167,8 +167,9 @@ static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
 		time_t must_change_time = pdb_get_pass_must_change_time(sampass);
 		time_t last_set_time = pdb_get_pass_last_set_time(sampass);
 
-		/* check for immediate expiry "must change at next logon" */
-		if (last_set_time == 0) {
+		/* check for immediate expiry "must change at next logon" 
+		 * for a user account. */
+		if (((acct_ctrl & (ACB_WSTRUST|ACB_SVRTRUST)) == 0) && (last_set_time == 0)) {
 			DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
 			return NT_STATUS_PASSWORD_MUST_CHANGE;
 		}