Hello Tim. Thanks for your answer.
Perhaps you are right and it is because my lab size (now its only single host and 2 vms - vcsa and vdp itself). Im going to create few vms to test backup and deduplication.
It is really possible that maintenance service would start right after deployment if the infrastructure is too small? Did you have such issue before?
Btw, I also restarted VDP once after configuration was finished to fix timezone issue (VDP 6.1 Can I choose the correct timezone please?!). May be this cause maintenance service to start.