Database Mirroring: Interoperability and Coexistence (SQL Server)
Database mirroring can be used with the following features or components of SQL Server:
Database mirroring does not interoperate with the following:
Cross-database transactions/distributed transactions
For information about why such transactions are not supported, see Cross-Database Transactions Support For Database Mirroring or AlwaysOn Availability Groups (SQL Server).
AlwaysOn Availability Groups