You'll need to add permissions to "anonymous" as contributor for each of the Exchange public folders in question.
I set contributor as "anonymous" for my Exchange public folders, but the external accounts still cannot send email to the public folders. The email gets stuck in my Outlook Web Access (OWA) local delivery queue. Please advise.
Do you have comments on this Ask the Expert Q&A? Let us know.
Related information from SearchExchange.com:
Dig Deeper on Exchange Server setup and troubleshooting
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.