Dear Hameed Ogbara,
as a rule of thumb: If another font is displayed in the DocuWare Viewer, the font is not embedded to the document.
In order to enable the DocuWare Image workers to render the document with the correct font, the font needs to be installed on all DocuWare frontend machines.
Simply copy the font file (f.e. fontname.ttf) to the server and double click on it. The windows font viewer will open. In this font viewer you can install the font right away.