get-help New-CsMobilityPolicy –full

This will give some interesting reading IF you have deployed CU4 that got released today (or yday)

Lync 2010 Mobile is a client application that enables users to run Microsoft Lync 2010 on their mobile phones. Call via Work provides a way for users to make calls on their mobile phone and yet have it appear as though the call originated from their work phone number instead of their mobile phone number. Users who have been enabled for Call via Work can achieve this either by dialing directly from their mobile phone or by using the dial-out conferencing option. With dial-out conferencing, a user effectively asks the Microsoft Lync Server 2010 Mobility Service server to make a call for them. The server will set up the call, and then call the user back on their mobile phone. After the user has answered, the server will then dial the party being called.

Both of these capabilities – the ability to run Lync 2010 Mobile and the ability to use Call via Work – are managed using mobility policies. When youinstall Microsoft Lync Server 2010, you will have a single, global mobility policy that applies to all your users. However, administrators can use the New-CsMobilityPolicy cmdlet to create custom policies at either the site or the per-user scope.

Other than a description of the policy, mobility policies have only two properties. The first, EnableOutsideVoice, determines whether or not Call via Work is enabled; the second, EnableMobility, determines whether or not users are allowed to use Lync Mobile. Both of these properties must be set to true before a user can take advantage of Call via Work. If EnableMobility is set to True and EnableOutsideVoice is set to False, the user can run Microsoft Lync Mobile but will not be able to use Call via Work. If EnableMobility is set to False and EnableOutsideVoice is set to True the user will not be able to run Microsoft Lync Mobile. In turn, that means that the user will not be able to use Call via Work, regardless of the value of the EnableOutsideVoice property.

Note that users must also be enabled for Enterprise Voice before they can use Lync 2010 Mobile. To use Call via Work, users must be managed by a voice policy that allows simultaneous ringing.Who can run this cmdlet: By default, members of the following groups are authorized to run the New-CsMobilityPolicy cmdlet locally: RTCUniversalServerAdmins. To return a list of all the role-based access control (RBAC) roles this cmdlet has been assigned to (including any custom RBAC roles you have
created yourself), run the following command from the Windows PowerShell prompt:

Get-CsAdminRole | Where-Object {$_.Cmdlets -match “New-CsMobilityPolicy”}