HTTP/1.1 302 error?

We are conducting performance testing on Microsoft Dynamics CRM 2015 using the performance test tool "NeoLoad".
Created a script and ran it with 250 virtual users. When we ran the script with 250 users it is throwing "HTTP/1.1 302 Found" error for couple of users. But When we ran the script with 10 users, no issues observed

Please find the attached error details file and advise