MS Outlook Mobile Service 2013
Microsoft supports the OMS (Outlook Mobile Service/Office Mobile Service) with the delivery of Office 2013 only in SharePoint. Within Outlook 2013, the OMS will not be continued, which we regret very much.
If you use the Outlook Mobile Service as part of your workflow, we advise you to take an update to Outlook 2013 into careful consideration.
We will see if there will be 3rd-Party Add-Ins that allow sending text messages from Outlook 2013 in the future.
If ASPSMS is planning something in this direction, we will report in the monthly newsletter.
Official Microsoft Statement
Discontinuing support for Office Mobile Service
In Office 2010, developers can build web services for Office Mobile
Service (OMS) to integrate the mobile capabilities of Outlook and
SharePoint with mobile devices. In Office 2013, only SharePoint
continues to support OMS. Outlook 2013 has also deprecated the
MobileItem object and its members. Attempting to create a
MobileItem using Application.CreateItem returns E_INVALIDARG.