Environment: ISPConfig 3.1.15 multiserver setup with mirror of each server. Ubuntu 18.04 Apache2.4.29 www1 has the right permission but changing the folder permission on www2 will change its corresponding folder in www1 to another random user. I'm not using unison. /var/www is stored from a file server and is mounted to web servers. www1 Folder Permission client0\web1 client0:web1 client0\web2 client0:web2 client0\web4 client0:web4 client0\web7 client0:web7 client0\web8 client0:web8 www2 Folder Permission client0\web1 client0:web4 client0\web2 client0:web1 client0\web4 client0:web2 client0\web7 client0:web5 client0\web8 client0:web8
You probably missed enabling the option 'Connect Linux userid to webid' in ISPConfig under System > server config > web before you added the first website. It is described in the mirror tutorials that this option must be enabled. If this option is not set, then web users might get different uid's as the Linux useradd command will just use the next free uid which then causes the issues that you describe.
my bad. It was unchecked on both server. I enabled that option. but still same behaviour. Do I need to readd every website?