Microsoft has released Lync 2010, its unified communications platform for iPhone, iPad, Android phones and Nokia Symbian.
Microsoft Lync 2010 mobile clients combine instant messaging, conferencing and calling features in a single application.
According to Pat Fox, senior director of marketing for Microsoft Office, with Lync 2010 apps, people can check colleagues' availability at a glance, start an IM conversation or join audio conferences with a single tap.
Writing on the Office blog he said: "With everyone always on the go, having access to your notes and communication tools across mobile platforms is a huge time saver."
Microsoft has also updated OneNote for the iPhone to version 1.3. Fox said the update provides easier navigation, table viewing and improved performance. Fox said Microsoft intended to release a version of the app tailored for iPad.
Fox added: "We know the way people get stuff done is constantly evolving and that people can choose from a wide variety of productivity and collaboration tools today. Whether it's Office running on Windows, a Mac, a wide variety of web browsers or a mobile phone, our goal is to deliver the best productivity experience across devices."