There is no charge for this service.
Microsoft Lync is a cross-platform chat and presence tool that is integrated with the Exchange directory and with Outlook. Everyone at OSU with an @oregonstate.edu email address (principally faculty and staff) may opt in to this service at no additional cost.
The Mac and Windows versions of Lync let you:
Lync clients are also available at no charge for Windows Mobile, iOS and Android, although conferencing support for these products is very limited.
With Lync, you can conference with people who use Skype and AOL, but it is not compatible with Google Hangouts.