Network access will be denied when you have manually enabled OPP in the WFBS console. To resolve the issue, you may do the following:

1. On the Security Server and other servers with shared folders or files that you cannot write to:
   1. Unload or exit from the Security Agent.
   2. Stop all Trend Micro Security Agent services and kill the remaining Security Agent processes.
2. Go to the …Trend Micro\Security Agent folder and check if TMOpp.ini (without underscore "_") and TmOppRestore.ini are present. If yes, delete both files.
3. Access the PCCSRV folder and check TmOpp.ini in the Pccnt\Common folder and TmOppSetting.ini in the Web\TmOPP folder. See if Enable / Disable Opp is set to Enable =0 for both.
4. Wait for two minutes and make sure that nothing has restarted yet.
5. Start the Trend Micro services in the following order:
   1. Trend Micro Security Server Master Service
   2. Trend Micro Smart Scan Service
   3. Trend Micro Security Agent Listener Service
   4. Trend Micro Security Agent Real-time Scan
   5. Worry-Free Remote Manager (WFRM)
6. Wait for two minutes for the destination server to update its configuration in the Security Server. OPP will be disabled and the network can be accessed.