I’ve noted this as the 2020 edition because simply… Microsoft loves to change their GUIs and portals. If you’ve worked with Office365 for a long time, you can remember the BPOS days and all the subsequent portals.
Anywho, the link for Exchange Admin is more in-line with the Sharepoint and Teams admin portals and is easier to remember: https://admin.exchange.microsoft.com/
As of this writing, it’s… pretty blank when you arrive there. You can still run message traces through here. One of the bigger changes is they’ve combined User and Shared Mailboxes under Mailboxes and put distribution lists and Office365 groups under Groups. Resource Mailboxes are under Resources.
As of now, I still work out of PowerShell or the old admin center. This will probably be finished by late next year… just in time for the next version of the EAC to apprear.