Started using Outlook.com ; so far so good
In the webmail version, I only struggle with the address book. As in: whenever trying to add a contact to addresses, the address book opens as a second tab. Which makes me confused if closing that tab and signing out of the inbox at the end of having read and sent mails, is sufficient to have logged off from the entire account?
PS: same can happen the other way round: going from the inbox to address book in the same tab, but when then wanting to return to the outlook.com inbox it opens as a new tab.
Of course the above problem is only occuring in the webmail version, not in an email client.