Data migration is important for the success of your business and it can be a very expensive option too. However it is worth the money being spent for the consultant. The merging of data from outlook contacts, Microsoft Access, multiple Excel Spreadsheets and Email Newsletter Database etc would be the basis of data migration process. Try to establish a long term relationship with the Salesforce Integration Consultant and consider the effectiveness of their ongoing support before deciding to make them your future salesforce integration partners based on the future improvements. Cloud Stewards, we are partners with leading cloud solution providers including Salesforce, Microsoft, Oracle and AWS.