mixed authentication types

Hello,

I've not found a suitable answer in the documentation yet, so I wanted to ask this question here.

I have a requirement to use SAP NetWeaver Single Sign-On to authenticate two separate user groups. One group is via Windows AD and the other would be via SiteMinder to a second Windows AD.

The environment includes: ECC6, CRM2007, BW3.5

Questions:

1) is it possible to setup mixed authentication for the two user groups I've listed above?

2) does anyone have experience with this to share?

3) would SiteMinder require a separate application server to handle the user groups behind it?

Appreciate your input.

Paul