One of the more common questions about Office 365 has been – what happens to my data after my organization’s Office 365 subscription ends? The most common answer circulated in the community refers to a grace period of 30 days, during which you can still retrieve your data.
The answer’s not wrong, but here’s some more detail about the tenant lifecycle after an Office 365 subscription is cancelled, as it relates to the organization’s data.
During the first 30 days after an Office 365 subscription ends, the Office 365 tenant account is in this grace period, known as expired state. During this period, users can still access data. If the subscription ended unintentionally, a rare event I’d argue given the many alerts you get to prevent termination of subscription due to issues such as non-payment, this is a good time to set things right.
Read more at source: http://blogs.technet.com/b/exchange/archive/2015/12/18/data-immutability-and-office-365-tenant-lifecycle.aspx