The oledb
driver is deprecated and not available for newer version of SQL Server.

The good new is the that Microsoft
admitted they have made a mistake:
However, during subsequent reviews it was determined that deprecation
was a mistake because substantial scenarios within SQL Server still
depend on OLE DB and changing those would break some existing customer
scenarios.
and the oledb
driver is no undeprecated. The new version will be released in March 2018. Unfortunately, the first version is going to support only SNAC 11.0.x functionalities, so nothing new that comes with SQL Server 2014+ is going to be supported:
The new release of OLE DB will not support Transparent Network IP
Resolution, Always Encrypted, Azure AD Authentication, Bulk Copy and
Table Value Parameters to begin with.
You can wait for the new version of the driver that is going to support Always Encrypted. Otherwise, you can use two connections - one using the new ODBC driver where AE is needed, and one using the current OLEDB driver in order not to rewrite everything.