Summary
The Officescan server management console shows duplicate entries for the same computer when logged in with different user accounts. The agents appear offline.
Details
The offline issue could be caused by a corrupt Officescan database (HTTPDB). Please check the database to confirm.
Go to C:\Program Files\Trend Micro\OfficeScan\PCCSRV\HTTPDB and check if has a lot of temporary (.tmp) files. If it has, recreate the HTTPDB again by following this KB article: https://success.trendmicro.com/solution/0121265-identifying-the-tmp-files-created-under-the-httpdb-folder-in-the-officescan-osce-server.
Once done, resolve the issue regarding duplicate entries when logging in using different account by following this KB: https://success.trendmicro.com/solution/1105483-clients-connected-via-vpn-do-not-appear-in-the-web-console-in-officescan-osce