Azure Automation does not support the Process{} block

There's an undocumented bug in Azure Automation: it does NOT support the Process { } block, i.e. the block that you would use when creating scripts / modules where you need to support piping in your commands.

I discovered this after much trial and error trying to run a runbook and having it silently and mysteriously fail with no output whatsoever, no matter what verbosity and progress settings I enabled.

Re-adding a Hybrid Runbook Worker to an Automation Account runbook worker group

If you receive the error: Add-HybridRunbookWorker : Machine is already registered to different account

Simply delete the key under: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HybridRunbookWorker and try the command again.

Thanks go to Wayne Hoggett for pointing this out, this point reprints his.