As part of UPS's commitment to data security, we are migrating from access keys to OAuth 2.0 for all APIs. This modern security protocol enhances security, protects customer data, and provides better customer insights. Please ensure your integration has migrated to OAuth 2.0 as soon as possible, as protecting our customers' data is our top priority. Detailed guidance can be found in the Resources tab. For any questions, contact us at uoltects@ups.com.