Ideally, you are targeting a firm whose investment philosophy, management style and client base are a good fit for your existing practice. Even so, there are bound to be gaps in your team’s knowledge and service model that could negatively impact the services delivered to the newly acquired clients. Part of your work with the previous advisor should include going through their book to identify those gaps and devise strategies to address them. That could mean asking the advisor to broker introductions with their own external partners, such as attorneys and CPAs, who can either provide guidance themselves or point you to other resources who can support your planning efforts.
Clients might anticipate a period of adjustment when joining your firm, but continuity is key to a successful acquisition. The smoother you can make that transition, the better chance you have of maintaining as many of those relationships as possible.