Office 365 and high availability
Are there any options for high availability with Office 365?
I'm thinking of a situation where you somehow sync the cloud server with an on-premises Exchange server.
I know it's possible if you do your own thing with Exchange, but we'd like to take advantage of O365 as a kind of backup / externally available mail store.
I know there is the hybrid / relay option but all that does is control mail flow for separately stored mailboxes. We want all mailboxes on site but also available externally, say for example when it rains the the internet goes down for a week, which could happen any time now....!