You can generate the SharePoint AccessToken in your salesforce apex class. Please refer the below code Or you can refer my Youtube : SharePoint Access Token - Salesforce Apex Class public class SharePointAccessToken { @AuraEnabled public static void getAccessToken(){ string bodyRequest; HttpRequest request = new HttpRequest(); bodyRequest = 'grant_type=client_credentials'; bodyRequest += '&client_id=ee232e2f-c11a-4a56-98df-e24d3f600571@4b529a0e-f8fe-4269-b994-febc3d20f8cc'; //bodyRequest += '&client_secret=xMM/qKtAG0UOL8rAJ/OKJ7j+Fz5acczPDsr5KFVm58k='; bodyRequest += '&client_secret=xMM%2fqKtAG0UOL8rAJ%2fOKJ7j%2BFz5acczPDsr5KFVm58k%3D'; bodyRequest += '&resource=00000003-0000-0ff1-ce00-000000000000/v2218.sharepoint.com@4b529a0e-f8fe-4269-b994-febc3d20f8cc'; /* Note : In client_secret Just replace (Like in above client_...