- I was unable to find/block the phone via Find my Phone.
- My MS account is still associated to my phone.
- By now the phone has a different owner and it is associated to a second MS account, probably.
- My carrier does not maintain an IMEI blacklist.
Since MS knows the IMEI, why it allows pairing to a second account?
From a technical point of view, forbidding the association to a second account (or asking for permission from first account) seems fairly simple. Even blocking the phone via internet seems simple as long as you know the IMEI.
MS Support was unable to help me (they had problems understanding what I am asking).