If your controllers are configured to use secure communications with signed certificates, the best practice is to create new
certificates for each controller and install them after migration. However, it is also a good idea to export the current certificates
before migration in case you need them later.
To save your existing keys, export them from the User Key Store and the User Trust Store prior to migration. These are deleted
from each controller during migration to
N4. After migration, if you choose to not create new certificates, you can import the exported certificates back using
Workbench and a platform connection.