First, I am going to ask what took you so long? I don't know of anyone that has done such a jump between versions but my experience upgrading to 6 from 5.5Enhanced was painless. But as a precaution I made multiple copies of the message store in case I had to restore (this is a good safety precaution in any case). Also, make sure you apply SP1 immediatly as it has the PADLOCK security fix incorporated. Joshua Rothschild
j.rothschild@dynamode.com