I am planning on deploying both a SQL Server 2005 Cluster and an Exchange 2007 Cluster in the near future. I had hoped to to set up my clusters as follows:1 Exchange 2007 active server2 SQL 2005 active servers1 failover server acting as the failover for both the SQL and Exchange clusters. If this works I would then add other servers clusters in still using the 1 failover server for all clusters.Has anyone tried this? If it is not recommended (and I could find very little info one way or the other) why not?Any advice would be greatly appriciated!

SQL and Exchange cannot co-exist on the same box or the same cluster. Sorry.

Good to know, thank you!As an alternative can I have seperate SQL and Exchange clusters both use the same node as the failover node (the failover node would be in both clusters)? Or am I looking at 2 completely seperate clusters here?Basically what I am trying to accomplish is have 1 failover node for all my clustered critical services (Exchange, SQL, File/Print, IIS, etc).Thanks.

That wouldn't work with windows clustering as the products have to be installed on the failover node. The only thing to have 1 'failover' box would be to have it as a cold standby with just windows server installed.