IDocumentService documentService = officeAplication.getDocumentService();
IDocument document = documentService.loadDocument(datei, DocumentDescriptor.DEFAULT);
ITextDocument textDocument = (ITextDocument) document;
ITextService textService = textDocument.getTextService();
IBookmarkService bookmarkService = textService.getBookmarkService();
IBookmark bookmark = bookmarkService.getBookmark("Status");
String name = bookmark.getName();
bookmark.setText("In Arbeit NEU345");
textDocument.getTextFieldService().refresh();
document.getPersistenceService().export(dateiNeu, new MSOffice97Filter());
textDocument.close();