This is because in the latest announcement made by Microsoft, the company has announced that integration between LinkedIn and Outlook.com will be going live. Plans for integration were announced last month and it looks like it will now be available for users. According to Microsoft, “Starting today, this new experience begins rolling out to consumer users of Outlook.com, providing rich insights, profile pictures, work history, and more, right from within your personal inbox.”
Basically this saves users the effort from having to create separate profiles for their accounts, and it can also help users look up other users on LinkedIn within Outlook.com (assuming they linked their accounts together). This isn’t the first time we’ve seen LinkedIn integrate itself into email services, although given that Microsoft successfully closed their acquisition of the company last year, seeing Microsoft integrate their products together doesn’t really come as a surprise.