CONTENT INDEX STATE FOR ALL DATABASES APPEAR AS "UNKNOWN".

I am running a brand new installation of Exchange 2016.I have a Windows 2016 Standard working as the domain, and another Windows 2016 Standard with all the roles of Exchange 2016.
So far everything is working fine with the users, groups, rules, etc. with the exception of the SEARCH function (either on OWA or on local OUTLOOK 365).

The state of every database appear as unknown.
After reading and trying some suggestions, the problem still persists.
- I've tried stopping the 2 search services, renaming and deleting the GUID folder in the database directory and restarting the services.
- I've tried moving one the database (the one that only has 2 users) to a new database and mounting the new one.
Nothing has worked and top management is starting to put pressure on solving this issue ASAP.

Here is a screenshot of the databases states,

Thanks for your help,
Roberto.
databases.jpg