You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Outlook Web App virtual directories" entry in the Client Access Permissions topic.

1. In the console tree, navigate to Server Configuration > Client Access.
   
   
2. Click the server that hosts the Outlook Web App virtual directory.
   
   

   Note:
   To enable Outlook Web App to accept anonymous access, you must disable all forms of authentication.

3. On the Outlook Web App tab, open the properties of the virtual directory that you want to configure to use anonymous access, and then click the Authentication tab.
   
   
4. Select Use one or more of standard authentication methods.
   
   
5. Don't select an authentication method. If any authentication method is selected, click the check box to clear it.
   
   
6. Click OK.
   
   
7. You'll receive a warning that you haven't chosen an authentication method and that directs you to use the Shell to set an authentication method. Click OK to close the warning.
   
   
8. Restart IIS by opening a Command Prompt window and typing the command iisreset/noforce.
   
   

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "Outlook Web App mailbox policies" entry in the Client Access Permissions topic.

Open the Shell on the Client Access server that's hosting the Outlook Web App virtual directories that you have to configure and use the following examples to disable active authentication.

Note:
To enable Outlook Web App to accept anonymous access, you must disable all forms of authentication.

1. This example disables forms-based authentication on the /owa virtual directory and the site named Default Web Site.
   
   

   	Copy Code
   Set-owavirtualdirectory -identity "owa (default web site)" -FormsAuthentication:$false

2. This examples disables all forms of standard authentication on the /owa virtual directory and the site named Default Web Site.
   
   

   	Copy Code
   Set-OwaVirtualDirectory -Identity "owa (Default Web Site)" -WindowsAuthentication $false Set-OwaVirtualDirectory -Identity "owa (Default Web Site)" -BasicAuthentication $false Set-OwaVirtualDirectory -Identity "owa (Default Web Site)" -DigestAuthentication $false

3. When the last active authentication method has been disabled, you'll receive a warning that no authentication method is specified for the virtual directory and telling you to use the Set-OwaVirtualDirectory cmdlet to specify an authentication method. Ignore this warning.
   
   
4. Restart IIS by opening a Command Prompt window and typing the command iisreset/noforce.
   
   

For more information about syntax and parameters, see Set-OwaVirtualDirectory.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "IIS Manager" entry in the Client Access Permissions topic.

1. Open IIS Manager.
   
   
2. Navigate to the Web site and virtual directory for which you disabled all authentication methods in the previous steps. In a default configuration, this directory will be at Web Sites\Default Web site\owa.
   
   
3. Open the properties of the virtual directory, and then click the Directory Security tab.
   
   
4. Under Authentication and Access Control, click Edit.
   
   
5. Select Enable Anonymous Access.
   
   
6. Click OK two times to save your changes. You may receive an Inheritance Override warning. Click OK to close the warning.
   
   
7. Restart IIS by opening a Command Prompt window and typing the command iisreset/noforce.