Hi Katherine!
If you export a registrant list, you will need to create a new excel document for those you want to import into the speaker section. There is a speaker import file you can use as a template, but it would be a manual process. There isn't a way to sync registrants into the speaker section, however through the Speaker Resource Center your speakers can register for the event if they'd like.
Thank you!
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Erica Kennedy
Principal Client Success Manager
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