Detects blocked Delta Sharing IP access attempts due to Delta Sharing IP allowlists, highlighting potential unauthorized access from unexpected locations. The rule relies on Databricks audit logs to identify access attempts and failures where the source IP is not allowed (e.g., 403 responses with messages like "IP address not allowed" or "Source network not in allowlist"). It aggregates events from the past 24 hours to surface recent activity and reviews the past 7 days to identify patterns or repeat offenders. Signals are mapped to MITRE ATT&CK TA0001:T1078 (Valid Accounts) as an initial access cue. The rule is tagged for Databricks Delta Sharing, with Initial Access, and is labeled Experimental with Medium severity. Runbook steps are provided to query logs, assess geographic or threat context of source IPs, and examine historical failures to identify anomalous behavior.