Google has improved how its calendar and email services interact with Windows Phones running the mango system. Users can now cram up to 25 different calendars into the OS’s built-in calendar app.
BUT the setup’s not exactly seamless and as easy as it seems. You need to navigate your Windows Phone to the Google Sync page, login and check the boxes found there.
Also at the same Google Sync page, you can now choose to enable the “send mail as” feature if you’re using multiple addresses, with the option to delete unwanted emails instead of archiving.