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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I am Sakthivel Madesh, a certified Salesforce Advanced Developer & Administrator working on Salesforce Technology since 2011. I am currently working in Techforce Services as Sr. Salesforce Developer. I have worked on multiple technologies Like PHP, Java, Salesforce, I am very passionate about Salesforce and to earn 15x Salesforce Certification. I love Trailhead for learning Salesforce Skill and Become a Trailhead 6x Ranger too. I Love to Learn & Share my Salesforce knowledge to Salesforce Learners/Beginner using My Blog and Salesforce Community.

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