When creating a ticket users are having the option to share with. It says entire companyname or no one..
can i disable this from somewhere please?
This may assist with your issue https://community.atlassian.com/t5/Jira-questions/JIRA-Service-Desk-Issue-being-auto-shared-with-organization/qaq-p/160204
But if they are a part of an organization then they will have the option to share an issue with the entire organization.