Sharepoint Server 2007 support has been announced by Symantec, for Backup Exec 11d only.
On 28th June 2007, Symantec announced support for Sharepoint Server 2007 (and Sharepoint Services 3.0). The announcement gives links to the pages for the hotfix downloads.
This support extends to build 7170 of Backup Exec 11d. Users of earlier versions will need to upgrade. Users of an earlier build of 11d will need to update their installation with the latest build.