Step 1: Log in to SAP GUI
Execute the tcode >> strust
Step2: Click on SSL server standard
Step 3: Select the edit option here
Step 4: As shown in the screenshot, you need to merge three certificates in one text document
Step 5: Copy the content from provided SSL certificate in text format
Step 6: You can see all certificates merged in one single text file
Step 7: Import certificate as shown in the below screenshot
Step 8: Select the SSL_prd_certificate and click on the open tab
Step 9: As shown below click on Allow tab and proceed further.
Step 10: Now click on the green tick ✓as shown below and proceed.
Step 11: As you can see the SSL certificate prompt click on import as certificate and it is done.