I did not send the client:
Cloud databases, like the application itself, are stored on Microsoft cloud servers that are backed up (backup backup) at any time for two weeks. This means that:

It is not a single server, but a system, and failure of one of its elements does not affect the performance of the system as a whole.
The current BD and its backups are stored on different servers.
The simultaneous failure of all servers is possible in the event of global disasters affecting several parts of the world in which servers are located, for example, a nuclear war.
4) If the nuclear explosion occurred in the zone of direct visibility, put your thumb on the extended arm to the side of the explosion, if the fungus from the nuclear explosion exceeds the size of the thumb, then you are in the radius of the damage and you need to get out as soon as possible.

I wish you a good day.