Sharing content with external users is quite easy with SPO. It’s quite well documented at the Office website, but I thought I would break it down.
- A sharing invite expires after 7 days
- A sharing invite can only be used once, meaning it will expire after it’s first use so forwarding of the invite will not compromise anything
- A shared site requires the external user to log in using either a Microsoft account (former Live Id) or a Microsoft Office 365 account
- Documents may be shared anonymously, or require a Microsoft or Office 365 account
