Below are the Networking requirements for Autopilot as recommended by Microsoft.
https://ztd.dds.microsoft.com,
https://cs.dds.microsoft.com, and
https://login.live.com
Allow access to all hosts via port 80 (HTTP), 443 (HTTPS), and 123 (UDP/NTP)
https://go.microsoft.com/
http://go.microsoft.com/
https://activation.sls.microsoft.com/
http://crl.microsoft.com/pki/crl/products/MicProSecSerCA_2007-12-04.crl
https://validation.sls.microsoft.com/
https://activation-v2.sls.microsoft.com/
https://validation-v2.sls.microsoft.com/
https://displaycatalog.mp.microsoft.com/
https://licensing.mp.microsoft.com/
https://purchase.mp.microsoft.com/
https://displaycatalog.md.mp.microsoft.com/
https://licensing.md.mp.microsoft.com/
https://purchase.md.mp.microsoft.com/
The following tables list the ports and services that the Intune client accesses:
Domains
IP address
login.microsoftonline.com *.officeconfig.msocdn.com config.office.com graph.windows.net enterpriseregistration.windows.net
portal.manage.microsoft.com m.manage.microsoft.com
52.175.12.209 20.188.107.228 52.138.193.149 51.144.161.187 52.160.70.20 52.168.54.64 13.72.226.202 52.189.220.232
sts.manage.microsoft.com
13.93.223.241 52.170.32.182 52.164.224.159 52.174.178.4 13.75.122.143 52.163.120.84 13.73.112.122 52.237.192.112
Manage.microsoft.com i.manage.microsoft.com r.manage.microsoft.com a.manage.microsoft.com p.manage.microsoft.com EnterpriseEnrollment.manage.microsoft.com EnterpriseEnrollment-s.manage.microsoft.com
40.83.123.72 13.76.177.110 52.169.9.87 52.174.26.23 104.40.82.191 13.82.96.212 52.147.8.239 40.115.69.185
portal.fei.msua01.manage.microsoft.com m.fei.msua01.manage.microsoft.com portal.fei.msua02.manage.microsoft.com m.fei.msua02.manage.microsoft.com portal.fei.msua04.manage.microsoft.com m.fei.msua04.manage.microsoft.com portal.fei.msua05.manage.microsoft.com m.fei.msua05.manage.microsoft.com portal.fei.amsua0502.manage.microsoft.com m.fei.amsua0502.manage.microsoft.com portal.fei.msua06.manage.microsoft.com m.fei.msua06.manage.microsoft.com portal.fei.amsua0602.manage.microsoft.com m.fei.amsua0602.manage.microsoft.com fei.amsua0202.manage.microsoft.com portal.fei.amsua0202.manage.microsoft.com m.fei.amsua0202.manage.microsoft.com portal.fei.amsua0402.manage.microsoft.com m.fei.amsua0402.manage.microsoft.com portal.fei.amsua0801.manage.microsoft.com portal.fei.msua08.manage.microsoft.com m.fei.msua08.manage.microsoft.com m.fei.amsua0801.manage.microsoft.com
52.160.70.20 52.168.54.64
portal.fei.msub01.manage.microsoft.com m.fei.msub01.manage.microsoft.com portal.fei.amsub0102.manage.microsoft.com m.fei.amsub0102.manage.microsoft.com fei.msub02.manage.microsoft.com portal.fei.msub02.manage.microsoft.com m.fei.msub02.manage.microsoft.com portal.fei.msub03.manage.microsoft.com m.fei.msub03.manage.microsoft.com portal.fei.msub05.manage.microsoft.com m.fei.msub05.manage.microsoft.com portal.fei.amsub0202.manage.microsoft.com m.fei.amsub0202.manage.microsoft.com portal.fei.amsub0302.manage.microsoft.com m.fei.amsub0302.manage.microsoft.com portal.fei.amsub0502.manage.microsoft.com m.fei.amsub0502.manage.microsoft.com portal.fei.amsub0601.manage.microsoft.com m.fei.amsub0601.manage.microsoft.com
52.138.193.149 51.144.161.187
portal.fei.msuc01.manage.microsoft.com m.fei.msuc01.manage.microsoft.com portal.fei.msuc02.manage.microsoft.com m.fei.msuc02.manage.microsoft.com portal.fei.msuc03.manage.microsoft.com m.fei.msuc03.manage.microsoft.com portal.fei.msuc05.manage.microsoft.com m.fei.msuc05.manage.microsoft.com
52.175.12.209 20.188.107.228
portal.fei.amsud0101.manage.microsoft.com m.fei.amsud0101.manage.microsoft.com
13.72.226.202
fef.msua02.manage.microsoft.com
52.177.194.236
fef.msua04.manage.microsoft.com
23.96.112.28
fef.msua06.manage.microsoft.com
13.78.185.97
fef.msuc03.manage.microsoft.com
23.101.0.100
fef.amsua0502.manage.microsoft.com
13.85.68.142
Admin.manage.microsoft.com
52.224.221.227 52.161.162.117 52.178.44.195 52.138.206.56 52.230.21.208 13.75.125.10
wip.mam.manage.microsoft.com
52.187.76.84 13.76.5.121 52.165.160.237 40.86.82.163 52.233.168.142 168.63.101.57 52.187.196.98 52.237.196.51
mam.manage.microsoft.com
104.40.69.125 13.90.192.78 40.85.174.177 40.85.77.31 137.116.229.43 52.163.215.232 52.174.102.180 52.187.196.173 52.156.162.48
*.manage.microsoft.com
40.82.248.224/28 20.189.105.0/24 20.37.153.0/24 20.37.192.128/25 20.38.81.0/24 20.41.1.0/24 20.42.1.0/24 20.42.130.0/24 20.42.224.128/25 20.43.129.0/24 40.119.8.128/25 40.74.25.0/24 40.82.249.128/25 40.80.184.128/25 52.150.137.0/25
http://windowsupdate.microsoft.com
http://*.windowsupdate.microsoft.com
https://*.windowsupdate.microsoft.com
http://*.update.microsoft.com
https://*.update.microsoft.com
http://*.windowsupdate.com
http://download.windowsupdate.com
https://download.microsoft.com
http://*.download.windowsupdate.com
http://wustat.windows.com
http://ntservicepack.microsoft.com
https://*.prod.do.dsp.mp.microsoft.com
http://*.dl.delivery.mp.microsoft.com
https://*.delivery.mp.microsoft.com
https://tsfe.trafficshaping.dsp.mp.microsoft.com
www.msftconnecttest.com must be resolvable via DNS and accessible via HTTP.