office apps typically failed to work well with federated AAD accounts – in earlier versions of the product suite. Lets look at office16 (preview!)
Note that we have upgraded from the officially supported version (downloaded from office.com) to the preview, which perhaps justifies why we start out with an existing hotmail/live account – to which we now attempt to add a second (email@example.com)account, bound to AAD.
This connects us to the account and services attached to the account:
One sees how the profile page projects the AAD record, and the organizational relationships too (rapstaff works for rapagent, for example)