Please use the following steps to create a custom Report
SMP Console > Reports > Custom Reports > Right Click > New > Report > SQL Report
Paste the following SQL query within Parameterised Query Section
-- to view task server with Count of assigned clients
select cts._ResourceGuid, vc.[Name] as 'Server Name', cts.[Build], ( select count(*)
from [dbo].[Inv_Client_Task_Resources] ctr (nolock)
inner join [dbo].[vComputer] vc on vc.[Guid] = ctr._ResourceGuid
where ctr.[ClientTaskServerGuid] = cts.[ClientTaskServerGuid] ) as 'Client Count',
vc.[IP Address] as [IP Address], vc.[Domain], vc.[OS Name] as [OS Name]
from Inv_Client_Task_Servers cts (nolock)
inner join [dbo].[vComputer] vc on vc.[Guid] = cts._ResourceGuid
where vc.IsManaged =1
related KBs
Title: Report: To list all managed clients with assigned Task Server
http://www.symantec.com/docs/HOWTO84983
Title: Report: To list all ACTIVE Task Servers
http://www.symantec.com/docs/HOWTO61271