There are people who need to communicate with their clients frequently, what would be the best way for them to communicate? Yes, of course emailing! When it is about email services Hotmail is the pioneer of all the service providers available in the market. The journey of emailing started with the invention of Hotmail and it started with an initiative of Jack Smith and Sabeer Bhatia. From decades this email service is providing outstanding performance to its entire user base and so have the highest user base round the world. With amazing performance this emailing service shows few tech issues too. What to do in such situation? In such situations contact the technicians at Hotmail Help Number UK and get your issue fixed easily. There are people who use Hotmail and face technical issue frequently should take immediate action against it. There are several types of technical issues which you may come cross ways with this email service and one of such is “ Issue of invalid user