Всем привет , а что глабоальный список адресов и впраду нельзя больше сделать основным ? - Outlook on the Web 2016 and Office 365 Exchange Online
Similarly to OWA 2013, Outlook on the Web will default to your own Contacts folder and you can’t change this default. The discoverability of and method to switch between Address Lists hasn’t changed much either.
If you’d like to see this ability return in Outlook on the Web, you can vote for this feature suggestion on Outlook’s official UserVoice page: Change Default Address Book in OWA.