Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Public folders in Exchange are based on a mailbox architecture that allows public folders to benefit from things such as the resiliency of a Database Availability Group DAG and other mailbox features.
For limits in on-premises Exchange Server, see Limits for public folders. For additional management tasks related to public folders in Exchange Server, see Public folder procedures. You need to be assigned permissions before you can perform this procedure or procedures.
To see what permissions you need, see the "Public folders" entry in the Sharing and collaboration permissions topic. For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts in the Exchange admin center. Having problems? Ask for help in the Exchange forums. However, if you set the DefaultPublicFolderMailbox property on a user mailbox to a specific public folder mailbox, the user will still access the specified public folder mailbox even if the IsExcludedFromServingHierarchy parameter is set for that public folder mailbox.
A secondary hierarchy mailbox will serve only public folder hierarchy information to users if it's specified explicitly on the users' mailboxes using the DefaultPublicFolderMailbox property, or if the following conditions are met:. The public folder hierarchy contains the folders' properties and organizational information, including tree structure.
Each public folder mailbox contains a copy of the public folder hierarchy. There's only one writeable copy of the hierarchy, which is in the primary public folder mailbox. For a specific folder, the hierarchy information is used to identify the following:.
The hierarchy doesn't store information about email addresses for mail-enabled public folders. The email addresses are stored on the directory object in Active Directory. The public folder hierarchy synchronization process uses Incremental Change Synchronization ICS , which provides a mechanism to monitor and synchronize changes to an Exchange store hierarchy or content.
The changes include creating, modifying, and deleting folders and messages. When users are connected to and using content mailboxes, synchronization occurs every 15 minutes.
If no users are connected to content mailbox, synchronization will be triggered less often every 24 hours. If a write operation such as a creating a folder is performed on the primary hierarchy, synchronization is triggered immediately synchronously to the content mailbox.
Because there's only one writeable copy of the hierarchy, folder creation is proxied to the hierarchy mailbox by the content mailbox users are connected to. In a large organization, when you create a new public folder mailbox, the hierarchy must synchronize to that public folder before users can connect to it.
Otherwise, users may see an incomplete public folder structure when connecting with Outlook. To allow time for this synchronization to occur without users attempting to connect to the new public folder mailbox, set the IsExcludedFromServingHierarchy parameter on the New-Mailbox cmdlet when creating the public folder mailbox.
This parameter prevents users from connecting to the newly created public folder mailbox. When synchronization is complete, run the Set-Mailbox cmdlet with the IsExcludedFromServingHierarchy parameter set to false , indicating that the public folder mailbox is ready to be connected to.
For more information, see Create a public folder. Public folder content can include email messages, posts, documents, and eForms. The content is stored in the public folder mailbox but isn't replicated across multiple public folders mailboxes. All users access the same public folder mailbox for the same set of content. Although a full text search of public folder content is available, public folder content isn't searchable across public folders and the content isn't indexed by Exchange Search.
Outlook on the web is supported, but with limitations. You can add and remove public folders to your Favorites through Outlook, and then perform item-level operations such as creating, editing, deleting posts, and replying to posts through Outlook on the web. However, you can't create or delete public folders from Outlook on the web. If you already have Exchange SP3 public folders in your organization prior to installing Exchange , you must migrate those public folders to Exchange This step is optional.
If you don't mail-enable the public folder, users can post messages to the public folder by dragging items into it from within Outlook. In the details pane, under Mail settings - Disabled , click Enable. A warning displays asking if you are sure you want to enable mail for the public folder.
Click Yes. The public folder will be mail-enabled and the name of the public folder will become the alias of the public folder.
If you have multiple recipients with that name, the public folder's alias will be appended with a number. For example, if you have a distribution group named SalesTeam and you create a public folder named SalesTeam and then mail-enable it, the alias of that public folder will be SalesTeam1. If you have a hybrid configuration, the public folders created on Exchange Online are only visible to cloud-based mailboxes.
Conversely, public folders created on-premises are only visible to on-premises mailboxes. To complete a migration from Exchange Server to Exchange Online with public folders, see Configure legacy on-premises public folders for a hybrid deployment. Skip to main content. Click the … button and then select Folders. This will alter your mailbox view on the left-hand side, displaying your Public Folder Hierarchy.
Based on your permissions, you will be able to browse the Public Folder Hierarchy. You can also manage permissions on specific folders if your administrator has given you the rights to do so. In order to get this functionality, it needs to be first configured on your Exchange server. Lastly, you can add frequently visited folders to your Favorites , making it easy to get them multiple times without having to traverse the Public Folder Hierarchy each time.
Create a name by entering it in the Public Folder Database Name field and then select Browse to select the Exchange server that will host the new Public Folder Database. Click Next. Check the option to Mount this Database to make it available and then click Next. Once completed, click Finish. Now that you have your Public Folder Database created, you can proceed with creating your first Public Folder. On the top left-hand side, expand Public Folders — server.
Place the name of the folder under Name. Then click New to create the folder. Once the folder creates successfully, click Finish. On the left-hand column, under Public Folders — server. Select the parent folder of the folder that you want to mail-enable. This will list all of the subfolders in the center pane, including the new folder you created.
In the center pane, click on the new folder. Under the Actions pane on the far right-hand side, the option to Mail-Enable the folder will appear. Click on it to mail-enable the folder. Once mail-enabled, you will see a new option for Manage Send As Permission… , which allows you to add users that can send email on behalf of the mail-enabled folder. On the Manage Send As Permission dialog box, click Add to add users that you want to be able to send email on behalf of the mail-enabled public folder.
When finished, click Manage. By default, the alias used for the mail-enabled public folder SMTP address is the name of the folder. You can configure this by going to the Actions pane on the far right-hand side and clicking Properties. On the Properties window, select the E-Mail Addresses tab. Click OK when finished. Open the EAC and log in with administrative credentials Select Public Folders on the left-hand side, then click on Public Folder Mailboxes at the top of the main window.
Then, select the Organizational Unit and Mailbox Database. Click Save when finished.
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