Improvement
When you download files from the read-only SFTP Server, the SFTP adapter is not able to work with the files that have been already downloaded as in each polling interval files are downloaded again. This improvement adds the following options to the SFTP adapter, Delete After Download which specify whether the adapter deletes a file from the FTP server after you download it, Enable Timestamp comparison which specify whether the adapter downloads a file again based on its modified timestamp and Redownload Interval which specify the interval after which the adapter downloads files again if both Delete After Download and Enable Timestamp Comparison are set to "No".
Resolution
This update is available in the following cumulative update for BizTalk Server:
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Cumulative Update 6 for BizTalk Server 2016
References
For information about the service packs and cumulative update list for BizTalk Server, see the following article in the Microsoft Knowledge Base:
2555976 Service pack and cumulative update list for BizTalk Server
For more information about BizTalk Server hotfixes, see the following article in the Microsoft Knowledge Base:
2003907 Information about BizTalk hotfixes and Cumulative Update support
