Hi, did you manage to get past the 403 error? Seeing the same thing here when trying to add the account in the app set up. Thanks John
"Unspecified internal server error. reason={"messages":[{"type":"ERROR","text":"\n In handler 'ta_o365_server_ucc_system_snapshot': External handler failed with code '1' and output: 'REST ERROR[403]: Unauthorized client for the requested action - capability=ta_o365_get_credential'. See splunkd.log for stderr output."}]}"
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