How to get the Case Number using ThreadID from Apex Class:

using ThreadID, we can get the relevant Case Number using “getCaseIdFromEmailThreadId” method. see the below example for your reference:
String emailThreadId = ’00DD0CG3j._500D0ZaQLq’;
// Call Apex method to retrieve case ID from email thread ID
ID caseId = Cases.getCaseIdFromEmailThreadId(emailThreadId);
system.debug(‘caseId:::’ + caseId);

Same way we can prepopulate the Case ThreadID using formula fields,

Here ThreadID is nothing but its a combination of Your Salesforce ORG ID and Case ID.

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Salesforce MVP | 15x Salesforce Certified | Lightning Champion | Application Architect | 6x Trailhead Ranger | Sydney | Australia

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