I have two farms, SharePoint 2013 (New) and SharePoint 2010 (Old). I am currently migrating the stuff from old to new environment. New environment is already setup and during this migration process (which may take months), i want to use new environment's search service to give users a new search experience. I want to show search results from old environment as well.
I believe its possible to achieve this using Federated Search Service by publishing service applications from one SharePoint farm to another.
Question: Is it possible to publish SharePoint Search Service Application from SharePoint 2010 (Provider) to SharePoint 2013 (Consumer) environment?
I have seen multiple articles on setting up federated search including by Microsoft but they all shows the same SharePoint version i.e online and on-premises etc. I need to publish services from SharePoint 2010 to be used in SharePoint 2013 environment.
I'll really appreciate if someone share a MSDN or Technet article where Microsoft confirms the above question.
If there is any other possible way to achieve that, please share as long as i do not need to crawl the both environments.
Thank You