NetworkManager

[ifupdown]
managed=false

→

[ifupdown]
managed=true

sudo systemctl disable NetworkManager-wait-online.service
sudo systemctl mask NetworkManager-wait-online.service

network:
  renderer: NetworkManager

/etc/systemd/resolved.conf.d/voximplant.conf

[Resolve]
DNS=192.168.15.12 192.168.15.13
Domains=voximplant.local

sudo service systemd-resolved restart

Install packages

sudo apt install sssd-ad sssd-tools realmd adcli

Check if domain available

sudo realm -v discover ad1.example.com

Join Domain:

sudo realm join -U admuser ad1.example.com

[sssd]
domains = voximplant.local
config_file_version = 2
default_domain_suffix = voximplant.local
services = nss, pam

[domain/voximplant.local]
default_shell = /bin/bash
krb5_store_password_if_offline = True
cache_credentials = True
krb5_realm = VOXIMPLANT.LOCAL
realmd_tags = manages-system joined-with-adcli
id_provider = ad
fallback_homedir = /home/%d/%u
ad_domain = voximplant.local
use_fully_qualified_names = True
ldap_id_mapping = True
access_provider = ad

sudo service sssd restart

/etc/pam.d/common-session

session optional        pam_mount.so