Unable to create a subfolder for public folder Content provided by Microsoft Applies to: Exchange Server 2013 EnterpriseExchange Server 2013 Standard Edition Select Product Version All Products Symptoms Users who have Owner permissions to a public folder can't create a subfolder for that public folder. Cause The authentication for the RPC Client Access service to the hierarchy public folder mailbox fails because of token size. Resolution To fix this issue, install Cumulative Update 12 or a later cumulative update for Exchange Server 2013. Last Updated: Apr 28, 2016 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.