---
schema_version: "1"
id: 3a534365a9b171e6155e9123fd55b5d6dbeb2c86af40ac93808766789b2ce4c6
title: Replace Instanced URLs in API Traffic
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/264-0-0/rn_security_domains_instanced_api.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_security_domains_instanced_api.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 85d4d13bbe571d93c0efa3041e893b685640b5ab070e2386b50ed624347dd42e
description: To prevent disruption after infrastructure updates that change your instance name, replace instanced URLs in API traffic with your org’s My Domain login URL. That traffic stops in sandboxes in this release.
products:
  - Cross Cloud
release: "264"
---
# Replace Instanced URLs in API Traffic

To prevent disruption after infrastructure updates that change your instance name, replace instanced URLs in API traffic with your org’s My Domain login URL. That traffic stops in sandboxes in this release.

**Where:** This change applies to Lightning Experience and Salesforce Classic (not available in all orgs) in all editions except Database.com.

#### See Also

- [Update Instanced URLs in API Traffic (Release Update)](https://help.salesforce.com/s/articleView?id=release-notes.rn_update_instanced_urls_in_api_traffic.htm&release=264.0.0&type=5 "To prevent disruption when Salesforce ends support for API traffic that uses an incorrect instanced URL, make sure that API traffic to your org uses the org’s My Domain login URL. First available in Summer ’25, this release update was scheduled to be enforced in Spring ’26, but we postponed enforcement to a phased schedule that starts in October 2026 in sandboxes and January 2027 in production.")