Your company has an Office 365 subscription for midsize businesses and enterprises with separate cloud and on-premise identities. All client computers run Windows 7 Professional. You assign an Office 365 E3 license to each user and deploy the current version of Microsoft Office and the Microsoft Lync client to each client computer. Users can log in to Microsoft Outlook and Microsoft SharePoint Online by using their Office 365 credentials, but they cannot log in to the Lync client. You need to ensure that users can log in to all applications by using their Office 365 credentials. What should you do?

A. Reformat each client computer and reinstall Windows 7 Professional.
B. On each client computer, run the Office 365 Sign-in Assistant.
C. On each client computer, uninstall Office.
D. In the Lync Online Control Panel, enable the Log into Lync client option.
E. On each client computer, uninstall and reinstall the Lync client.

Correct Answer: B