I see similar questions and the answer is yes.
E.g. this post:
License GroupDocs - Free Support Forum - groupdocs.com
However, I’ve noticed that it works in most cases, but for GroupDocs.Metadata.NETFramework, I’m get…...this error when testing it with MSG email files. The same code works...msgFile: C:\Temp\GroupDocs\richtext.msg FileFormat : Unknown Error: The...