How to update a user's "webexId" by SetUser of WebEx XML API

We are looking into updating user by the SetUser of WebEx XML API.

In WebEx site-administration UI, it is possible to update a user's username.

For the SetUser of WebEx XML API, is it possible to update a user's "webexId"? And how to do it?

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SetUser command is capable of handling your request, you will just need to specify a newWebExId value

SetUser allows the user to change their user name via the newWebExId element. If the Site Admin
has enabled the “Allow user to change user name” setting then the user can change their setting as
long as it does not conflict with a prior name.

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