Location of UserUpdatedKey/UserCreatedKey and How SequenceNo is picked?

SOLVED

Hi,

I am looking at our backend tables and I am trying to determine what user did what.

In our worktickets I see UserCreatedKey and UserUpdatedKey but I cannot find a table that links those to the employees table.

I read that they might be stored in CI_Item because that links to SY_User.M4T but in our case they aren't. Any ideas on where I should look?

I am also trying to determine how Sage chooses the SequenceNo so that I can understand what is going on better so any information on that would be great too!

Thanks in advance!