List of pre-mapped Salesforce tables available as of 05/05/2018:
Account
Campaign
Case
CaseHistory
Contact
ContactHistory
Event
ForecastingCategoryMapping
ForecastingFact
ForecastingItem
ForecastingQuota
ForecastingType
Group
Lead
LeadHistory
LeadStatus
Opportunity
OpportunityContactRole
OpportunityFieldHistory
OpportunityHistory
OpportunityLineItem
OpportunityStage
Order
OrderHistory
OrderItemFeed
OrderItemHistory
Pricebook2
Pricebook2History
PricebookEntry
Product2
Quote
QuoteLineItem
Task
TaskPriority
TaskStatus
UserRole
Only the most popular fields for reporting purposes are pre-mapped out of the box. It’s simple to import additional fields from pre-mapped tables.