Creating elastic channels for Amazon Chime SDK meetings
You use the ElasticChannelConfiguration field in the CreateChannel API to create an elastic channel. Once you create an
   elastic channel, you create channel memberships.
Note
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For non-elastic channels, the
AppInstanceUserthat creates the channel is automatically added to that channel as a member and moderator. For elastic channels, the channel creator is only added as a moderator. - 
     
You can't update an
ElasticChannelConfigurationonce set. - 
     
You can't update a channel from elastic to non-elastic and vice-versa.
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You can't include a list of member ARNs in a CreateChannel API request. However, you can include a list of moderator ARNs.
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You can't create an
UNRESTRICTEDtype elastic channel.