Accessing organizational forms after migration from exchange 2010 to 2013

Hi,

according to http://www.msexchange.org/articles-tutorials/exchange-server-2013/migration-deployment/migrating-public-folders-exchange-2013-part1.html I migrated my public folders and assigned them to the public folder mailbox. Now I see that the organizational forms library is assigned to the public folder mailbox:

[PS] C:\PublicFolderPS>Get-publicfolder "\Non_IPM_subtree\eforms registry" | ft name, ContentMailboxName
Name                                                        ContentMailboxName
----                                                        ------------------
EFORMS REGISTRY                                             Mailbox1

Is it neccessary now to give the other mailbox users access rights on the public folder mailbox? If not, they don't see organizational forms in Outlook?

Greetings, George