Server-Side Encryption (SSE) of Amazon Simple Queue Service (SQS) message queues is supported by NSX Advanced Load Balancer. Encrypting a queue does not encrypt backlogged messages, nor does turning off encryption remove encryption from backlogged messages. SQS queue encryption is supported only in 3 AWS regions as of the time of this writing: US EAST (N. Virginia), US EAST (Ohio), and US WEST (Oregon).