roll up data is not a data type you can roll up. Unless there is a way to hack it...
Might make more sense to consolidate everyone on the same server if there is connectivity between servers.
SADRs are not ePO servers. They are systems running the McAfee Agent configured to serve content. There is no data to be rolled up as they are already reporting to a given ePO server.
Are you saying SADR, but really meaning that you have an additional ePO server? In that case, you can roll up the data to another ePO.
After posting the question, I had a similar thought like yours, being that all my local clients reporting to the ePO (#2).
Bottom line: Clients report to ePO server. In our case, all my local site clients report to ePO #2 which then rolls up to the corp ePO (#1).