Pinpoint - Two-Way SMS to Another Account SNS Topic

Question

Hello,

Is there a way to enable Pinpoint to post to another account's SNS topic?

I'm not seeing a way in the documentation [1][2] to use another account's SNS topic.

Within the Console, I can only see the same account's SNS topics.

I'm not seeing any limits either on this particular situation...I.E. "you can't use another account's SNS topic."

Sources:

1. https://docs.aws.amazon.com/pinpoint/latest/userguide/channels-sms-two-way.html

2. https://docs.aws.amazon.com/cli/latest/reference/pinpoint/index.html#cli-aws-pinpoint

Answer

Hello! One way to do this would be to subscribe a lambda to the SNS topic on Account #1 and publish a message on the SNS topic on Account #2 by assuming a role in that account, or by configuring [SNS access control](https://docs.aws.amazon.com/sns/latest/dg/sns-access-policy-use-cases.html) and allow your source account

Pinpoint - Two-Way SMS to Another Account SNS Topic

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