Understanding Changes to External Object ID (x00) Format and Recommended Best Practices

Customers may notice that the Salesforce IDs assigned to External Object records have recently changed format. This update is a result of the "Access Data Without Limits with Salesforce Connect" enhancement.

Due to this change, any custom Apex logic, SOQL queries, or integrations that depend on hardcoded or previously stored Salesforce External Object IDs (18-character IDs beginning with "x00") may stop working.

Record IDs can change after an org migration, an instance refresh, or because of internal architectural changes.

Previous Format: <keyPrefix> + <ServerId> + 10 digits
Example: x00Ny000012345678S

This format included server-specific identifiers.

New Format: <keyPrefix> + xx + 10 digits
Example: x00xx123445678908G
The "xx" prefix indicates IDs that are no longer tied to a specific server instance.