This is in regards to cleaning up our custom fields in JIRA Cloud. We are going through each custom field to see which issues are using that field. The best way we have found so far is to use advanced searching by looking for issues where that custom field is not null. However, this does not provide accurate results. We currently have ~16,000 issues, so it does not seem feasible to export to excel in 1000 issue chunks.
Is there syntax in advanced search to accurately provide the wanted results, or an alternative way of getting the data we need?
Any help is greatly appreciated!