If you read the "Symantec Backup Exec™ 2010 Readme" you can find the folowing statement:
Agent for Lotus Domino Server
Supports Lotus Domino version 8.5, including support for the Domino Attachment and Object Service (DAOS).
For more information visit the "Symantec Backup Exec System Recovery Server Edition" Website.
This is a great feature for everyone who will/is using DAOS.