New-OabVirtualDirectory

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

• Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
• Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

The ExtendedProtectionFlags parameter specifies custom settings for Extended Protection for Authentication on the virtual directory. Valid values are:

• None: This is the default setting.
• AllowDotlessSPN: Required if you want to use Service Principal Name (SPN) values that don't contain FQDNs (for example, HTTP/ContosoMail instead of HTTP/mail.contoso.com). You specify SPNs with the ExtendedProtectionSPNList parameter. This setting makes Extended Protection for Authentication less secure because dotless certificates aren't unique, so it isn't possible to ensure that the client-to-proxy connection was established over a secure channel.
• NoServiceNameCheck: The SPN list isn't checked to validate a channel binding token. This setting makes Extended Protection for Authentication less secure. We generally don't recommend this setting.
• Proxy: A proxy server is responsible for terminating the SSL channel. To use this setting, you need to register an SPN by using the ExtendedProtectionSPNList parameter.
• ProxyCoHosting: HTTP and HTTPS traffic may be accessing the virtual directory, and a proxy server is located between at least some of the clients and the Client Access services on the Exchange server.

The ExtendedProtectionSPNList parameter specifies a list of valid Service Principal Names (SPNs) if you're using Extended Protection for Authentication on the virtual directory. Valid values are:

• $null: This is the default value.
• Single SPN or comma delimited list of valid SPNs: The SPN value format is Protocol\FQDN. For example, HTTP/mail.contoso.com. To add an SPN that's not an FQDN (for example, HTTP/ContosoMail), you also need to use the AllowDotlessSPN value for the ExtendedProtectionFlags parameter.

The ExtendedProtectionTokenChecking parameter defines how you want to use Extended Protection for Authentication on the virtual directory. Extended Protection for Authentication isn't enabled by default. Valid values are:

• None: Extended Protection for Authentication isn't be used on the virtual directory. This is the default value.
• Allow: Extended Protection for Authentication is used for connections between clients and the virtual directory if both the client and server support it. Connections that don't support Extended Protection for Authentication will work, but may not be as secure as connections that use Extended Protection for Authentication.
• Require: Extended Protection for Authentication is used for all connections between clients and the virtual directory. If either the client or server doesn't support it, the connection will fail. If you use this value, you also need to set an SPN value for the ExtendedProtectionSPNList parameter.

Note: If you use the value Allow or Require, and you have a proxy server between the client and the Client Access services on the Mailbox server that's configured to terminate the client-to-proxy SSL channel, you also need to configure one or more Service Principal Names (SPNs) by using the ExtendedProtectionSPNList parameter.

The ExternalURL parameter specifies the URL that's used to connect to the virtual directory from outside the firewall.

The InternalURL parameter specifies the URL that's used to connect to the virtual directory from inside the firewall.

The Path parameter specifies the file system path of the virtual directory. We recommend using this parameter only when you need to use a custom location for the virtual directory files. The default value is blank ($null), which indicates the default location is used.

The PollInterval parameter specifies the time interval in minutes that the distribution service polls the offline address book generation server for updates. The default value is 480 minutes (8 hours).

This parameter is reserved for internal Microsoft use.

The RequireSSL parameter specifies whether the client connection to the virtual directory requires Secure Sockets Layer (SSL) encryption. Valid values are:

• $true: SSL encryption is required to connect to the virtual directory. This is the default value.
• $false: SSL encryption isn't required to connect to the virtual directory.

The Role parameter species the configuration for the virtual directory. Valid values are:

• ClientAccess: Configure the virtual directory for the Client Access (frontend) services on the Mailbox server.
• Mailbox: Configure the virtual directory for the backend services on the Mailbox server.

Client connections are proxied from the Client Access services to the backend services on local or remote Mailbox servers. Clients don't connect directly to the backend services.

The Server parameter specifies the Exchange server that hosts the virtual directory. You can use any value that uniquely identifies the server. For example:

• Name
• FQDN
• Distinguished name (DN)
• ExchangeLegacyDN

The WebSiteName parameter specifies the name of the IIS website under which the virtual directory is created. You don't need to use this parameter to create the virtual directory under the default website.

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.