In order to check if the SSP database is synchronized with your content db execute this command
stsadm -o sync -listolddatabases 1
To make the correlation between IDs and the content database names you need to execute the following query on the SharePoint configuration database:
select o.id, o.name,* from objects o
inner join classes c on o.classid = c.id
where c.fullname like ‘%SPContentDatabase%’
If there are databases that haven’t been synchronized in the last days you can execute this command:
stsadm -o sync –deleteolddatabases 1
Now, you have to wait one hour for the synchronization job to start. One hour is the default value.If you want to change the synchronization job execution to every 5 minutes you can
run the following command
stsadm -o sync –synctiming m:5
If this will not work I will come with a new action plan.
For how many days the users are inactive? What is the SharePoint build number?
MCITP|MCTS SharePoint| SharePoint Performance blog