I see valid users showing up in the errors.txt file - is this OK?

Q:I see many other valid users also showing up in the errors.txt file. Do I have to do something to correct them or how can I enable timezone in their mailboxes?
A: Users may wind up in both errors and the output file due to a bug.  If the user in the errors.txt has an entry in the ouptut file, they are fine.