Using a company-managed Amazon S3 bucket for Cisco Umbrella logs allows the administrator to have full control over the access and lifecycle of the log data. This configuration can grant third-party SIEM integrations write access to the S3 bucket, which can enable more advanced analysis and correlation of the log data with other sources. This configuration also provides more flexibility in terms of how long the data can be stored offline, as opposed to the Cisco-managed S3 bucket, which has a fixed retention period of 30 days. References:
* Enable Logging to Your Own S3 Bucket
* Centralized Umbrella Log Management with Amazon's S3 service for MSP, MSSP, and Multi-org customers