SharePoint 2019 external prompting for credentials login

Hi All,

i have a Farm where i have setup a single farm with SharePoint 2019.

the farm in located in a DMZ zone and is joined in DMZ Domain.

my Issue is :

When people (external) is going to SharePoint site whey are prompt with a user and a password.

they have the dns name in the Truste site and whey are prompted 3 times 

is there eny settings that i can set on the SharePoint farm for that the user only get prompted one time ?

Hope you can help me