Crystal Report - Export to PDF - Error "Database Logon Failed"

Hello All...

We developed a web service to export a crystal report to PDFand hosted in IIS (7.5) and calling this web service from classic asp page.

In developer machine which is running on Windows 7 with IIS (7.5) , the code works fine but when deployed to production server which is running on Windows Server 2012 R2 Standard with IIS(8.5) causes export to fail with error message - "Database Logon Failed".

Referred below similar links and tried suggested solutions but could not find a solution.

• https://answers.sap.com/questions/11825682/database-logon-error-through-iis.html
• https://answers.sap.com/questions/13527189/error-database-logon-failed-when-exporting-a-cryst.html
• http://aspalliance.com/490_Troubleshooting_Database_Login_Errors_using_Crystal_Reports_with_NET.all
• https://www.c-sharpcorner.com/forums/crystal-report-export-into-pdf

Can anyone from SAP help us with a solution, please.

Thanks.