In the special_character_validation function in the snow.py file, there is a regex that only allows $ and _ as special characters. Modify the regex to allow a dot / period as well. Use regex101.com to test your regex. I was afraid it might break something else but I can confirm it works just fine. I was even able to dot-walk two fields (e.g. caller_id.location.country). The Splunk adapter version that I checked this was 7.1. The Splunk Enterprise version was 8.0.6 and the ServiceNow version was Paris.
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