1 个回答
Community users (such as partner) are associated with Contacts, whereas Chatter users count as internal users (not associated to contacts).
Although I can't find any documentation that specifically mentions it, I don't believe internal users can be converted to external ones.
I'm afraid your only option is to create new users for them, and deactivate the old ones. You may be able to change the ownership for the existing records by running an Apex script, which would hopefully make the transition relatively seemless.
