Question#1
Today I received a letter that a customer I didn't invite has joined our closed Jira Service Management as a customer.

I found out that Jira Service Management has no admin required. Is this the reason why the customer was able to join? Did he/she joined through customer portal?
If not, how did this customer joined my domain?
Audit log says the author is "Jira" and the user is added through "IDP Directory".

User management says that the user never visited.
Question#2 My supposedly closed JSM has portal set as visible. How do I turn this off?
![2024-01-04 18_27_30-[Closed] BPI BanKo HYD - Queues - Service project - Jira.png 2024-01-04 18_27_30-[Closed] BPI BanKo HYD - Queues - Service project - Jira.png](https://us.v-cdn.net/6038660/uploads/images/298863iE95562B32E817C21/2024-01-04%2018_27_30-%5BClosed%5D%20BPI%20BanKo%20HYD%20-%20Queues%20-%20Service%20project%20-%20Jira.png)