MS Office documents cannot be used as output format for mass data. They cannot compete with the established tools for quick and secure document generation. In addition, each business sector has its standardized exchange formats for data transfer.
However, in some circumstances MS Office documents can be an appropriate and cost-neutral solution. Here some examples:
Depending on your requirements, I can create AddIns in VBA or Visual Basic using Word or Excel as frontends for data from mainframe computers (based on textfile export) or from databases.
Projects and samples
Word: Creating Insurance contracts from mainframe data