Symptoms
Assume that you install Cumulative Update 5 (CU5) for Microsoft BizTalk Server 2016 together with Feature Update 3. You change the new Key Exchange Algorithm settings in the send ports, receive locations and host handlers in the BizTalk Server 2016 SFTP adapter and save them. When you reopen the Key Exchange Algorithm settings, you will notice that the settings are all blank.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This problem is fixed in the following cumulative update for BizTalk Server:
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Cumulative Update 6 for BizTalk Server 2016 Feature Update 3
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