Riva Cloud and Riva On-Premise use the following field mappings between Exchange and Salesforce:

Exchange Field	Salesforce Field
Contact Direct Field Mappings
FirstName	FirstName
LastName	LastName
Title	Salutation
JobTitle	Title
PrimaryTelephoneNumber (Unidirectional CRM to Exchange)	Phone (Unidirectional CRM to Exchange)
BusinessTelephoneNumber	Phone
HomeTelephoneNumber	HomePhone
MobileTelephoneNumber	MobilePhone
BusinessFaxNumber	Fax
OtherNumber	OtherPhone
AssistantTelephoneNumber	AssistantPhone
AssistantName	AssistantName
Birthday	Birthdate
Department	Department
EmailAddress	Email
BusinessAddressStreet	MailingStreet
BusinessAddressCity	MailingCity
BusinessAddressPostalCode	MailingPostalCode
BusinessAddressState	MailingState
BusinessAddressCountry	MailingCountry
HomeAddressStreet	OtherStreet
HomeAddressCity	OtherCity
HomeAddressPostalCode	OtherPostalCode
HomeAddressState	OtherState
HomeAddressCountry	OtherCountry
Notes	Description
Lead Direct Field Mappings
FirstName	FirstName
LastName	LastName
Title	Salutation
JobTitle	Title
CompanyName	Company
PrimaryTelephoneNumber	Phone
BusinessTelephoneNumber	Phone
MobileTelephoneNumber	MobilePhone
BusinessFaxNumber	Fax Business
BusinessHomePage	Website
EmailAddress	Email
BusinessAddressStreet	Street
BusinessAddressCity	City
BusinessAddressPostalCode	PostalCode
BusinessAddressState	State
BusinessAddressCountry	Country
Notes	Description
Event Direct Field Mappings
Subject	Subject
Body	Description
Location	Location
BusyStatus	ShowAs
ActivityDateTime	Appointment/Meeting StartDate
AllDayEvent	IsAllDayEvent
StartUTC	ActivityDate
Duration	DurationInMinutes
Sensitivity	IsPrivate
Recipients	Distribution
Task (Calendar) Direct Field Mappings
Subject	Subject
Body	Description
Importance	Priority
Status	Status
DueDate	ActivityDate
Opportunity Direct Field Mappings
Subject	Subject
Case Direct Field Mappings
Subject	Subject