Owner cannot create modern public folders by using Outlook in Exchange Server 2013 or Exchange Server 2016


Assume that you are the owner of a public folder mailbox or have sufficient access permissions to create a public folder in a Microsoft Exchange Server 2013 or Microsoft Exchange Server 2016 environment. The mailbox uses the secondary hierarchy as the default public folder mailbox. In this situation, when you try to create a public folder by using Microsoft Outlook, you receive the following error message:
Cannot create the folder. You do not have sufficient permission to perform this operation on this object.
See the folder contact or your system administrator.

Note If the default public folder mailbox is changed to a public folder mailbox that contains the primary hierarchy, you can create public folders by using Outlook.

See More information about how to troubleshoot the issue in this article.


This issue occurs because the LmCompatibilityLevel registry entry on the Exchange Server Mailbox Server role is configured to a value that is less than 2.


Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

To work around this issue, follow these steps on the Exchange Server Mailbox Server role that is hosting the secondary hierarchy public folder mailbox: 
  1. Change the value of the LmCompatibilityLevel registry entry to 2 or greater.

    Note The entry is located under the following registry path:

  2. Restart the following services:
    • Microsoft Exchange Information Store
    • Microsoft Exchange RPC Client Access
    • Microsoft Exchange Health Manager

More Information

For more information about the LmCompatibilityLevel setting, see the following articles:
More information to troubleshoot this issue


Artikelnummer: 3035230 – Letzte Überarbeitung: 01.10.2015 – Revision: 1