The manager said to his colleagues, “We have received a serious threat to our business now and we need to act to face it.”

The manager told his colleagues that they had received a serious threat to our business then and they needed to act to face it

The manager told his colleagues that they received a serious threat to their business then and they had to face it

The manager said his colleagues that they had received a serious threat to our business then and they needed to act to face it

The manager told his colleagues that they had received a serious threat to their business at that time and they needed to act to face it