OppenheimerFunds, a $222 billion global asset manager, is beefing up its services for advisors serving the needs of high-net-worth clients, Oppenheimer said Thursday.

The firm is partnering with Legacy Capitals, a provider of advice and education to wealthy families and their advisors, to provide coaching and education about working with multigenerational families.

Training sessions for financial advisors, bankers and RIAs will be held across the country and will include ways to differentiate practices in the marketplace, deepen relationships with existing clients and their families and acquire new high-net-worth clients.

"Being a successful advisor to high-net-worth families requires engaging and advising the entire family, including spouses, children and grandchildren. Advisors must adjust their approach from one to one, to one to family if they want to help their clients achieve the financial legacy they desire." said Ned Dane, head of the private client group at OppenheimerFunds.

"Our extensive research on HNW millennials has shown us they want a voice in the management and legacy of their family's wealth, alongside their parents. Helping the whole family plan for the successful transfer of wealth is not only best for the growth of their clients' assets—it helps ensure they remain a trusted advisor for generations to come," he added.