I have asked a similar question before a few years ago but I am still confused and cannot work it out.
I need to block a status transition (Resolved) based on whether a value is present in a custom field.
If 'Deploy sign-off required" = Yes then "Deploy sign-off by" and "Deploy sign-off date" must be populated. If they aren't populated then the transition to 'Resolved' must be blocked.
If 'Deploy sign-off required" is null then the ticket is allowed to be resolved without the sign off by and sign off date fields being populated.
I am attempting to do this by added a workflow condition but I can't work it out:
