Systems and networks are always more vulnerable when maintenance or upgrades are under way, as there’s more potential for the tiniest thing to either go wrong or not to plan and the ripple effects, as we’ve seen today, can be widespread. Microsoft services have recovered after tens of thousands of users reported its products, including Outlook and Teams, had stopped working. Microsoft blamed the outage on a change it made to its “Wide Area Network”, which had now been “resolved”. Do you think that Microsoft applications are very vulnerable to downtime and attacks?

