PureMessage Threat Detection Data out of date messages

Hi there,

Running Sophos PureMessage for Exchange and every night past few weeks I get a mail alert telling me:

The following detection data is out of date on server MAIL01:

Threat detection data

Please ensure Sophos AutoUpdate is configured and working correctly on the server.

I'm unsure whether that is accurate or if it is a false alarm so to speak as the updates seem to be working.

Can someone also please clarify that by running the auto-update on the Endpoint it updates the PureMessage definitions also. I have this set to update via local server first and second the Sophos server. Runs every 10 mins. From the product info page on the endpoint just now:

[Updating]
-[ Software]
Sophos AutoUpdate 2.9.0.344
Last checked for updates 18/09/2014 09:25:34
Update status Success

From PureMessage:

So I suppose my question is why am I getting the alerts and how can I check if everything seems to be working properly?

Appreciate the feedbackl!

Thanks