To open dashboard files from Drive365 go to menu Report – Dashboard. In the Dashboard dialog select Open from Drive 365, use your account to sign in, choose the desired dashboard file and then press Open.

You can open dashboard files directly from Drive 365 cloud in the backstage. In order to do that, go to the menu File – Open – My Projects – Drive 365 and then select the desired dashboard file (the one with .xml extension) and press Open.