TIBCO ActiveMatrix BusinessWorks Plug-in for Amazon SQS and SNS 6.5.2 Hotfix 1 is released for all supported platforms. Listed below is a summary of updates included in Hotfix 1.
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Closed Issues in 6.5.2_HF-001 

AWSM-610: Users can now configure custom endpoints for SQS & SNS activities using system properties.

For SQS: com.tibco.bw.amazonsqs.customendpoint
For SNS: com.tibco.bw.amazonsns.customendpoint

Steps to connect from TCI env to custom VPC endpoint for SQS/SNS plugin:

1. Start tibagent to create a tunnel between TCI env & Custom VPC endpoint. (Please check TCI docs on how to configure tibagent) Command to start tibagent -> tibagent start agent --spec {port number 1}:{Custom VPC endpoint URL for SQS}:443 --spec {port number 2}:{Custom VPC endpoint url for SNS}:443 {agentName}.
2. Deploy SQS/SNS application on TCI env.
3. From the Environment controls tab, click on 'Hybrid connectivity' & select 'Access Keys' which has been used to configure tibagent.
4. From the Environment controls tab, click on 'Engine variable' section & provide CUSTOM_ENGINE_PROPERTY like 'com.tibco.bw.amazonsqs.customendpoint={SQS VPC endpoint url}:{port number 1} com.tibco.bw.amazonsns.customendpoint={SNS VPC endpoint url}:{port number 1}'for more information see TCI doc(Adding Custom Engine Variables section).
5. Start a TCI instance for SQS/SNS application.