This is part of the NServiceBus Upgrade Guide from Version 9 to 10, which also includes the following individual upgrade guides for specific components:
Transports
Persistence
- Azure Storage Persistence Upgrade Version 6 to 7
- Cosmos DB Persistence Upgrade from 3 to 4
- SQL Persistence Upgrade Version 8 to 9
Other
Saga compatibility mode
Configuring saga compatibility is no longer supported for saga instances persisted by NServiceBus.Persistence.AzureStorage versions 1 and 2. Legacy endpoint instances that have this configuration must be upgraded to remove it.