Trend Micro DSM agentless VM clients status keeps changing

I'm using TrendMicro DSM 9.0 as the antivirus solution for our VDI pilot.  We just upgraded the VMware infrastructure from ESX 5.0 to 5.1 U1, along w/ View, vShield Manager, vCenter.

For almost every VM I've upgraded the VMware tools on, I see their status in the DSM Manager as "Anti-Malware Engine Offline" sometimes, and other times most of them switch back to "Online".  For the VM's that have not been upgraded yet, they stay consistently as "Online".  

I've verified the View Agent has been upgraded properly.  I've verified the vShield system driver is running on the VM's.  I'm not sure where to go from here.

Let me know what other details I can provide!

Thanks!!
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RhoSysAdminAsked:
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damejenCommented:
I've also had a similar issue with only one of the vm's in our cluster using Trend Micro DSM agent less. All other guests are fine.

I tried uninstalling and re installing the vm tools which worked for a limited time, though the issue is back.

Try re-installing vm tools and make sure you choose complete installation.
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damejenCommented:
RhoSysAdmin,

If the issue returns or persists then I'd also try this which has permanently resolved my issue:

 Trend micro DSVA uninstall/install

Uninstalling/reinstalling the Filter Driver in Deep Security.

Solution:

Do the following:

1. From the vCenter, Power-off the Deep Security Virtual Appliance (DSVA).

2. Right-click on the DSVA and delete if from the Disk. Set the ESX on Maintenance Mode.

3. Delete the EPSEC driver. From the vShield Manager console, select the ESX host. Go to Summary tab and uninstall vShield Endpoint

4. Log on to the DSM console and initiate Restore ESX. It will delete all drivers installed and put them in "Unprepared" state.

ESX will be restarted On the DSM console, right-click on VMware Center and initiate Synchronize. Initiate Prepare ESX afterwards

5. Deploy DSVA.
Note: Do not activate the DSVA yet after installation. You need to configure it first.

6.Change the Network Adapter settings to be in the same network as the DSM.

7.Log on to the DSVA console using the Username/Password: dsva.

8. Define the Hostname, IP address, and Timezone.

9. Restart the DSVA console.

10. Log on to the DSM console. Verify that DSVA is now appearing. Right-click on DSVA and then click Activate.
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