All of a sudden your Junk Spam Filter folder no longer works?  Here's why:  You will need to Exit Outlook and update the registry as described below or simply use the quick fix link for your version of Outlook: Make sure you Exit Outlook, then select your link, SaveAs to your system, then Run and accept the security notice Outlook 2019    Outlook 2016    Outlook 2013    Outlook 2010. Once that's done, re-open Outlook and the Junk Spam Filter folder should now work.  If that does not do the trick, you may also need the registry key listed at the bottom of this page for your version of Outlook.

A complete description of the reason is listed here below:

Applies to: Outlook 2019, Outlook 2016 (Win), Outlook 2013, Outlook 2010, Outlook 2007

October 12 2017 A security update released on October 10 2017 removes the Home Page tab from Outlook 2010, 2013, and 2016. This change was made for security reasons but because so many applications use Folder Home Pages, Microsoft has a registry key available to re-enable folder home page support.

home page tab is missing

Remember: if a registry key doesn't exist, you'll need to create it or select the "Do it for me" links below:

Outlook 2019 & Outlook 2016
HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\16.0\Outlook\Security
DWORD: EnableRoamingFolderHomepages
Value: 1
 

Outlook 2013
HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\15.0\Outlook\Security
DWORD: EnableRoamingFolderHomepages
Value: 1

Outlook 2010
HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\14.0\Outlook\Security
DWORD: EnableRoamingFolderHomepages
Value: 1

home page tab is restored

Do it for me

Outlook 2019    Outlook 2016    Outlook 2013    Outlook 2010

Relevant KB articles are Outlook 2016: KB4011162; Outlook 2013: KB4011178; Outlook 2010 is KB4011196.

 

Folder Home Pages aren't available

September 2011

Problem: When you right-click on any of the folders that are listed down the left hand side in Outlook and choose Properties and then Home Page tab, the Home Page feature is disabled, preventing you from changing the address.

The home page setting is disabled in non-default data files "by design", beginning with Outlook 2007. If you want to use a folder home page in other data files and the URL field is grayed out, you'll need to configure a registry key to enable it.

You need to edit the following registry key and add the NonDefaultStoreScript value or select the "Do it for me" links below:
 

Outlook 2019 & Outlook 2016
HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\outlook\security
DWORD: NonDefaultStoreScript
Value Data: 1 (Hexadecimal) to enable.

Outlook 2013
HKEY_CURRENT_USER\Software\Policies\Microsoft\office\15.0\outlook\security
DWORD: NonDefaultStoreScript
Value Data: 1 (Hexadecimal) to enable.

Outlook 2010
HKEY_CURRENT_USER\Software\Policies\Microsoft\office\14.0\outlook\security
DWORD: NonDefaultStoreScript
Value Data: 1 (Hexadecimal) to enable.

Outlook 2007
HKEY_CURRENT_USER\Software\Policies\Microsoft\office\12.0\outlook\security
DWORD: NonDefaultStoreScript
Value Data: 1 (Hexadecimal) to enable.

After setting the registry value, you may need to restart Outlook for it to take effect.

Note that the Show folder home page checkbox is disabled (grayed out) until you enter a URL in the Address field.

Folder Home Page Properties sheet