Proc HTTP : auth_negotiate fails and run successfully in another day while accessing sharepointAPI

[learn_SAS_23]

• Does the SYSUSERID used in Proc http authentication ?
• In our case we verified from sharepoint admin team , that the userid used in our ETL programs have access  to the sharepoint site , But still the batch run  fails by throwing “unauthorized 401 header “ in some runs

 and run successfully in another day  (with response code 200 in the header).

we are using below code

 proc http
    url = &sharepoint_URL.
    out = outfile
    method = "get"
               headerout=hdrs
     auth_negotiate
     ct='text/html
     charset=utf-8'
     verbose;
debug level =3;
run;

• w.r.t  reference guide SAS Help Center: Wire Logging ,  how to enable the   logger APP.TK.HTTPC  to trace the reasons for failed authentication  ?
• please post your suggestions to address this issue.

[Sajid01]

SAS Tech Support is the best resource to approach in this case.