One of my LAN customers just installed Digital Signatures for all employees and the Send SLX feature stopped working. We did all the obvoius tricks like uninstalling and reinstalling the dlls but no change. 

If we turn off “Add Digital Certificate to outgoing messages” under the trust center, it logs correctly in SLX. As soon as I turn it on again, it doesn’t. Is this a SLX Limitation, was it fixed in an upgrade?  

Has anyone seen this before or know of a workaround. They are running 753. I was thinking up upgrading the dll's to 754 and seeing what happened.

Thanks