 NORWALK, Conn.--BUSINESS WIRE-- DattoMSP--Datto Holding Corp. Datto NYSE:MSP, the leading global provider of cloud-based software and security solutions purpose-built for delivery by managed service providers MSPs, today announced it will be hosting its first ever virtual MSP Marketing Sales Day on May 20th. Historically, MSPs have struggled with sales and marketing efforts, often citing the lack of in-house resources and technical backgrounds as reasons. Last year, on top of the pandemic, 