you'd have to do some development to build the interface to actually to those actions in SharePoint, and then the code on the back-end of the SharePoint page to actually communicate with CRM to retrieve Contacts, and update contacts.
That would be a lot of effort for dubious benefit. Why are you trying to do CRM activities in SharePoint? Why not just have a link (or even an IFRAME) in SharePoint that takes the user to CRM to work on contacts?
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