Hi,
I feel I should be able to provide a list here, but realistically, your best bet is to do the upgrade and see what doesn't work. Any customisations that use functionality that isn't directly listed in the Crm 4 sdk APIs has a potential to not work. Anything
to do with the ISV directory and impersonation is going to be a problem. Also focus on any JavaScript customisations that use functions that are not part of the standard crm form API.
Scott Durow
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