We have a need for a field to show the number of days since an opportunity was modified. however we would like to sort a view based on this table. this seems easy enough, I created a calculated field to calculate the difference between DateModified and NOW(). This works great except you can not use it to sort a view. My best guess is Dynamics treats either DateModified or NOW as a calculated field and will not allow sorting by a calculated field if it relies on another entity or another calculated field (this is listed in the documentation.
so the question is, is there any work around?