Migrate from Single Tier to Three Tier

Hello all,

I currently have a pilot implementation of DLP where I've setup a single tier architecture of DLP. Now we're planning to expand the setup and move to Three Tier architecture. What would be the best possible approach.

1. Fresh three tier installation and moving agents to new server?

2. Migrate existing database and policies on new server? Is it possible to migrate database from single tier server to three tier? What all things I will have to consider in this case?

Also, the existing setup is v14.5. I was thinking of moving to v14.6 for new installation.

Kindly assist.