Hi,
Thanks for posting in Microsoft MECM Q&A forum.
Based on my experience, linked deployment shares cannot work between different domains. It's recommended to use DFS and DFS-R within your domain. And in case of cross domain or workgroups robocopy /MIR would suffice.
For more information, please refer to: Cross Domain MDT Replication Question
Thanks for your time.
Best regards,
Simon
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