My company recently signed with a new ESP to offer our clients, therefore we are in the beginning stages of planning out our on-boarding and training strategy. I wanted to reach out to y'all and see if you had any advice on what has worked and what to stay away from when it comes to this - any pearls of wisdom greatly appreciated! As I want to make the transition from old ESP to new ESP as seamless as possible for both the client and myself.

Thanks so much!