The environment

Reboot sequence - top to bottom

First reboot the holder of the FSMO roles

TGN-DC01.TOGGEN.INTERNAL (wait till all auto services are running again)

    Remote Desktop Licensing

TGN-DC03.TOGGEN.INTERNAL (wait till all auto services are running again) (when this is a Azure VM the reboot may take as little as 4 missed pings - services take longer to come up though)

    Network Policy Server

    Azure AD Connect

Then reboot the of the remainder of the servers in one go...

TGN-RDSGW

    Network Policy Server

    IIS

    RDS Gateway

TGN-RDS01

    Session Host

TGN-RDSBK01

    Broker

TGN-FP01

    File & Print

Check RDS login, mapped drives and line of business aplications are working