Hi Michal,
We had planned to release a Measure Tool add-in sample with the final release of ArcGIS for SharePoint v2.1.1 - but unfortunately did not get it completed in time. We are still working on it and plan on releasing it sometime in the 2nd quarter of this year.
Hope this helps,
Where do we get this Measure Tool add-in for ArcGIS for Sharepoint 2.1.1?
How to get this to work?