Zumero is a solution that will sync data between SQL Server databases and SQLite databases. This allows your mobile clients to have the richness and speed of a relational database with offline access. Once they are back online, a sync will upload their local changes and bring any changes that were made on the server. This demo VM has Zumero configured, along with a free SQL Server Express instance configured with a demonstration SQL database. Everything you need to test the client sync is already on the VM. You will need to request a demo license from https://zumero.com/dev-center/zss as part of the setup script.