Where can I get the iPhone and iPad apps?

From your iPhone / iPad device:
  1. Open the App Store app on your device.
  2. Search for “Office Chat” and select the first result.
  3. Click the “Free” button and then click “Install”.
From your computer:
  1. You can download the latest version of the Office Chat application for iOS from the App Store.
  2. Office Chat for other platforms can be downloaded from here.