DYNAMICS 365 HOW TO FORCE RECALCULATE ROLLUP FIELDS
              In this quick Blog post, we will see how to force recalculate Rollup fields in JavaScript and C#  using the below functions.                                                          Recalculate Rollup field in JavaScript (for account entity)                                                        function reCalculateRollupField(entityPluralName, recordGuid, rollupFieldName) {                     recordGuid = recordGuid.replace("{", "").replace("}", "");                     var requestUrl = Xrm.Page.context.getClientUrl() + "/api/data/v9.0/CalculateRollupField(Target=@tid,FieldName=@fn)?@tid={'@odata.id':'" + entityPluralName + "(" + recordGuid + ")'}&@fn='" + rollupFieldName + "'";                     var HttpReq = new XMLHttpRequest();                     // Double Check the API URL                     HttpReq.open("GET", requestUrl, true);                ...