Skype for Business（旧称'Microsoft Lync'和''''Microsoft Office Communicator''''）和Microsoft Lync for Mac是一个配合Microsoft Lync Server一同使用，又或随同Office 365与Live@EduLync Online附送的即时通信客户端，用以取替过往与Microsoft Exchange Server一同使用的Windows Messenger，于2011年1月25日由微软推出。此软件有专为Mac OS设计的Microsoft Lync for Mac。

Skype for Business (formerly Microsoft Office Communicator and Microsoft Lync) and Microsoft Lync for Mac are instant messaging clients used with Skype for Business Server or Lync Online available with Microsoft Office 365. They are replacements for Windows Messenger, which was used with Microsoft Exchange Server.