Connecting to Lync Online (O365) By Using Windows PowerShell

First Configure your system for the Lync online follow the below link for configure you system for Lync online.

Configuring Your Computer for Lync Online Management

Remote management of Lync Online by using Windows PowerShell is supported only on 64-bit computers running one of the following operating systems:

• Windows 7
• Windows Server 2008 R2
• Windows Server 2012
• Windows Server 2012 R2
• Windows 8
• Windows 8.1

Computer must also be running the following:

• Windows PowerShell 3.0
• Microsoft Online Services Sign-In Assistant for IT Professionals RTW
• Lync Online Connector Module

You can find information about downloading and installing these items in the following topics:

Downloading and Installing the Lync Online Connector Module 
Downloading and Installing the Microsoft Online Services Sign-In Assistant 
Downloading and Installing Windows PowerShell 3.0

Connect to Lync online PowerShell using the below script

 

$credential = Get-Credential

$session = New-CsOnlineSession -Credential $credential

Import-PSSession $session

Ref # http://technet.microsoft.com/en-us/library/dn362795.aspx