Office 365: who owns my data and is it secure?


“In the same way as if you park your car in a multi-storey car park, it still belongs to you, so with you data in a Microsoft data centre. It’s still very much you who owns the data; Microsoft is simply looking after it – the custodian – a parking attendant and security guard combined, if you like.

So while you still own your data – and control it – and can take with you if you decide to leave the service – Microsoft is the custodian.If you check out the Microsoft Trust Centre, you’ll see they take the security and compliance aspects of your data very seriously.

  • They encrypt your data while it’s at rest so it’s protected on their servers.
  • They encrypt your data in transit between you and Microsoft with transport layer security TLS (or SSL), which is a set of cryptographic protocols designed to provide communications security over a computer network.
  • And to avoid any tampering of data they manage threats, monitor security and maintain your file and data integrity”