I would also be interested in this. I have asked Epicor support for documentation in E10 to provide this, and this was what they sent me:
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I checked with development and they have entered an enhancement SCR #167212 to update the documentation. The only development notes I have on this SCR is the following:
“This will need a token service or similarâ€
http://blogs.msdn.com/b/wenlong/archive/2010/02/21/using-asp-net-sessions-from-wcf.aspx
We will contact you again when we have more information.
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I followed up with them after 2 or 3 weeks and received this answer:
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SCR was targeted on 10.2 and there is no timeframe currently; they did send me the attachment but I don’t have any context other than the file. Hope that helps.
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HTH,
Tanner