I tried an experiment to Samba 4.13.3 and also to Azure sending the new signing negotiate context during negprot. Azure ignored it as expected, but Samba server rejected it with "STATUS_INVALID_PARAMETER" (it wasn't obvious at first glance what was invalid about it but perhaps Samba wants different rounding than Azure). Has anyone tested the signing negotiate context (e.g. newer Windows) to Samba server? -- Thanks, Steve