Hi Alexander,
Let's try to detect where problem appears. Firtsly please run the following queries for one of affected computers to check MS Office or its components reported to Notification Server from this client.
--Query1
select * from Inv_AddRemoveProgram iarp
WHERE iarp._ResourceGuid = 'MachineGUID' --put real computers guid here
--Query2
select vsc.Name from Inv_InstalledSoftware iis
join vSoftwareComponent vsc on iis._SoftwareComponentGuid = vsc.Guid
WHERE iis._ResourceGuid = 'MachineGUID' --put real computers guid here
> If you do not see required software component there, then it was not reported from client side to DB, so we need to investigate client side. You may run Inventory task with enabled Software checkbox only and disabled checkbox "send delta.." on one of affected machines and check results - run same queries, attach Agent logs captured during scan if software component do not appear.
> If you see required software component(s), then please let me know where do you expect to see them in Symantec Management Console, but do not see them..
Thanks,
Roman