I'm not a Lotus expert, but you're described what it seems to be the customer configuration. The Lotus client knows both the two servers: one as primary and one as secondary. I think the answer to your first question is yes.
I'm using CV as archiver configured in backup mode, because the customer doesn't want the stubs.
Can you please describe me the way to configure CV to treat these two mail servers as a cluster even if not supported?
The mail system is composed by two separate servers with their own private lotus data and binaries paths replicated amomg the systems through the Lotus utilities.
Can you send me the link where is reported that this scenario is not supported?
If this is a common scenario ( the customer and lotus consultant told me that this configuration is very common ) why this configuration is not described in documentation.commvault.com (I didn't find any information)
thank you for your help