I migrated AIQUM from one host to

[tawny adder]

is it specifically failing on the hostname, or you can't click regenerate?

if it's just the hostname, I would start here:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Infrastructure_Management/OnCommand_Suite/AIQUM_fails_to_regenerate_a_certificate_with_the_Common_Name_(CN)_of_the_host_certificate_is_not_valid

[lilac ember]

Thank you. I was sent the KB article earlier, and that fixed my issue.