Office 0xCAA70007: Microsoft 365 Apps cannot reach the activation service
Microsoft documents 0xCAA70007 and 0xCAA80000 as connection failures, not licence refusals. Here is the published fix and the plan check behind it.
0xC004F06B: The Licensing Service Will Not Make This Machine a KMS Host
0xC004F06B stops a machine becoming a KMS host. Microsoft publishes no meaning for it, so here is how to work out which refusal you have.