Support import from consumer OneDrive account, as well as Student / Staff Office 365 Account

[coopsatwork]

We originally support import from consumer accounts, but found it didn't work on our staff / student accounts. The old code is still here in the GitHub history.
We need to implement as a fail-over measure:

1. Attempt connection as Office 365 Student / Staff Account
2. On Fail, Attempt connection as consumer Account
3. On Fail, er, Fail.