我没有试过, 既然你用的是on-premiseb版本,你可以用这个
http://crm2011sharestep.codeplex.com/
“To use this assembly, copy it into the C:\Program Files\Microsoft Dynamics CRM Server\Server\bin\assembly directory (or wherever your server base directory is) and use the Plugin Registration Tool to register it, giving it a meaninful Name and Group name.
Now you will have one extra step to chose from while creating workflows.”