This article is part of the In Microsoft Dynamics 365 Business Central (Administration), how do I… series and of the wider In Microsoft Dynamics 365 Business Central, how do I… series which I am posting as I familiarise myself with Microsoft Dynamics 365 Business Central.
If something catastrophic happens with your Business Central system, then it is possible to do a point in time restore of the environment; this does seem to be limited to the environment level rather than the company level.
This is a feature of how Business Central stores the data for companies; basically an environment is a database and the tables for all of the companies are in the database, prefixed with the company name.
You can do this by logging into the Business Central admin center, select the environment and click the Restore button: