Intranet can definitely serve as a very powerful tool to communicate in an organization. But you need to keep in mind a few points which can help you achieve your objective of making it a successful platform for your organization.
Intranet uses Internet protocols and is similar to a website. Difference between Internet and Intranet is that the latter, unlike the former, is an internal network, confined within an organization.
Internet is one of the fastest evolving entities to have ever been known to mankind. A decade back having a website or rather an online address was a symbol of pride for most businesses.