You may import Leads and Clients into the MSICRM database. The data file needs to be in a CSV format. The template is below.
Please note that the NAME field is not needed in Leads imports but is required for Clients imports. The NAME field references Account Name. An Account Name is generally an umbrella account over multiple clients such as a household (husband and wife) or a company.
Some formats of the NAME field:
Smith, Joe (if individual)
Smith Joe and Susie (if married)
Joe Smith Co (if company)