how to modify alerting (on VNX5400

hi,

my VNX5400 is sending me alerts every few days:

Scheduled nas_checkup has posted a warning. See /nas/log/checkup.181028-035003.log for more details.

thelogfile tells me the VNX system has 2 issues:

- auto send support files to emc is not enabled

- I have configured only one DNS server

Does somebody knows how to modify these check-scripts?

thanks in advance