Can you create business rules based on child grids?
When creating an Opportunity there is a grid called "Sales Team" and a field called "Identify Sales Team".
I would like to create the following business rules when creating an Opportunity or moving it between stages in the workflow Process.
How can this be done?
Not using business rules as far as I know.
You can use JavaScript to count the number of records in a sub grid, then set the field conditionally in JavaScript.
var count = Xrm.Page.getControl("sales_team_grid").getGrid().getTotalRecordCount();
if(count > 0) {
... set your field value
}