For Office 365 APS 1.x it was required to configure additional up-sales for domain services plans, based on *.onmicrosoft.com tld (e.g. refer to the documentation, page 50). Do we need to configure the same for Office 365 APS 2.x?
No, such configuration is not required anymore. Instead, "Office 365 Domain" and "DNS Hosting" resources should be included into Office 365 Service Template ( http://download.automation.odin.com/poa/Office365_APS2/doc/86406.htm) and subdomain form must be properly configured.