Spire.Doc.Document SPD = new Spire.Doc.Document("d:\\14376457_11-13-39.doc");
SPD.SaveToFile("d:\\14376457_11-13-39.pdf", Spire.Doc.FileFormat.PDF);
using last Spire.Office Platinum(Hotfix) Version:9.2.0
OS Windows server 2019
file will be sent by email for security purpose