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The move, which follows Zoho already offering sign-in with Google, Google Apps and Yahoo accounts, means that Facebook's 400 million-plus users will be offered access to Zoho's service without having to create a separate account.
If you share your documents with users not on Zoho, they can access the documents by logging in using their Facebook accounts, explains Zoho in a blog post
"We don't want account creation to be a hindrance to try Zoho. So we simplify this by allowing users to try Zoho using their existing accounts," says Zoho, promising plans to "to expand this further."