Start a new SSH session to your XenServer host and run the commands below.

### Using curl ###
[18:18 xcp-node-01 ~]# bash -c "$(curl -sS https://xoa.io/deploy)"

### Using wget ###
[18:18 xcp-node-01 ~]# bash -c "$(wget -qO- https://xoa.io/deploy)"

If you are using an old XenServer version, you may encounter SSL connection issues. This can bypassed by using the unsecure connection instead:

### Using curl ###
[18:18 xcp-node-01 ~]# bash -c "$(curl -sS http://xoa.io/deploy)"

### Using wget ###
[18:18 xcp-node-01 ~]# bash -c "$(wget -qO- http://xoa.io/deploy)"

If you’re using DHCP server on the default network, agree to proceed with the installation:

Welcome to the XOA auto-deploy script!

Network settings:
IP address? [dhcp]

For Static IP address provide all required IP related information such as netmask, gateway, and DNS server. With the DHCP option, VM importation should start thereafter:

Your XOA will be started using DHCP

Importing XOA VM...

Booting XOA VM...
Waiting for your XOA to be ready…

Your XOA is ready on https://192.168.20.24/

Default UI credentials: admin@admin.net/admin
Default console credentials: xoa/xoa
VM UUID: 84f59294-a20c-3658-db12-6ed7152c6e08

Meanwhile If you access Xen cluster you should see VM importation in progress. When done a VM named “XOA” should be visible. You can access the shell with the IP address assigned to the instance. The default logins were printed out during XOA importation

Your XOA is ready on https://192.168.20.24/

Default UI credentials: admin@admin.net/admin
Default console credentials: xoa/xoa

Src:
https://computingforgeeks.com/deploy-xen-orchestra-appliance-on-xen-xcp-ng/?expand_article=1