Raspunsul este DA!

Citez Books Online:

Database mirroring is fully supported in SQL Server 2005 Standard Edition and SQL Server 2005 Enterprise Edition, but the failover partners must use the same edition. Server instances that are running on SQL Server 2005 Workgroup Edition or SQL Server 2005 Express Edition support the witness role only.

 

---

Cristian Andrei Lefter, SQL Server MVP
MCT, MCSA, MCDBA, MCAD, MCSD .NET,
MCTS, MCITP - Database Administrator SQL Server 2005
http://sqlserver.ro