Server RPC not available

[Totten98]

Hi all,
I managed to upgrade my old installation to the latest docker build. Since then, I'm getting this "server RPC not available" error when I update a GPO. Even when i try to gpupdate /force from the clients i get the same error.
So I went ahead and created a new clean istance to try if the problem persist.
I created several new istance on several different commits and the problem still occours.
With the new istances, when I join the domain from a W10 vm, it joins the domain but shortly after the following error appears:

Unable to change the primary domain DNS name of this computer to "". The name will remain "domain.corp".

Error:

RPC server unavailable.

Is anyone have this same issue or know how to solve it?

Thanks in advance, Totten98

[Totten98]

I managed to "solve" my issue. The ports that the RPC server is using are not forwarded on docker.
I copied the docker compose from the documentation but is missing 49152-49172:49152-49172 on the ports since those are defined in the smb.conf

Another step I took to solve my issue was to check the db with samba-tools since I did upgrade from a really old version
sudo docker exec -it samba samba-tool dbcheck --cross-ncs --fix --yes

Those 2 things in combination solved my issue.

Thanks, Totten98

P.S.: I'm not closing this issue because still when creating a fresh install, even with the port mentioned above forwarded or with macvlan network, the "RPC server unavailable." error persists. Feel free to close it if the problem can't be reproduced.