We can use RetrievePrincipalAccess function in Web API to get the access rights of either a user or team on a specific record.
The sample code:
var req = new XMLHttpRequest();
req.open("GET", Xrm.Page.context.getClientUrl() + "/api/data/v9.1/systemusers(D38F5B76-C22E-4256-AF90-CFD14B6589BF)"+
"/Microsoft.Dynamics.CRM.RetrievePrincipalAccess(Target =@Target)?"+
"@Target={ 'accountid': '8CB09F67-EB90-E811-A963-000D3AD1CBD6', '@odata.type': 'Microsoft.Dynamics.CRM.account' } ", false);
req.setRequestHeader("OData-MaxVersion", "4.0");
req.setRequestHeader("OData-Version", "4.0");
req.setRequestHeader("Accept", "application/json");
req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
req.onreadystatechange = function () {
if (this.readyState === 4) {
req.onreadystatechange = null;
if (this.status === 200) {
var results = JSON.parse(this.response);
} else {
Xrm.Utility.alertDialog(this.statusText);
}
}
};
req.send();
Result:

Hope it helps..
































