SBS2011 random certificate error once a day at midday

I recently did a sbs2003 to sbs2011 migration that went well but had the default remote.domain.com settings in the self cert owa etc. I changed that to reflect the external DNS setup and installed a bout SANS UCC cert which works a treat apart from once a day I get a SSL cert error on the outlook 2010 clients at around luch time, Ive been through all of the settings on the GUI and also changed the ones from the command line. Initially I was getting 2 of these as you opened outlook and these are now sorted but this last one that pops up at lunchtime is eluding me. Any ideas where it might be coming from??
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plug1Asked:
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jaredr80Commented:
How was this cert added to your system? Because this is an SBS install extra care is needed to be taken when installing a cert. All certs should be installed via the SBS console. By failing to do this, issues likes you are observing can and will occur.

My recommendation would be to delete the cert and re-add through SBS console, network|connectivity.

-Jared
millardjkCommented:
Check your cert to make sure the correct SAN records are present. The fact that you get these errors on a time-based frequency suggests something else all together, but 99% of the time I see certificate errors related to Exchange 2007 and 2010, it's because the SAN for autodiscover.mydomain.com wasn't properly added.
plug1Author Commented:
Jared, your right I didnt use the wizard, I wish I had done and I'll try and re-add it. Millard all records are present and correct.
plug1Author Commented:
I found the rogue URL entry on the server, unfortunately I cant remember where it was but suffice to say if you go through every element in the EMC you will find them all.

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plug1Author Commented:
I found the solution myself but accept that jaredr80 is right in what he says.
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