An asterisk * in the title indicates the field is mandatory.
If a field has a default value, it is shown in the Description column.
If the field type is an array, the Field Name has a .[n] suffix, where n is the array index placeholder.
Object and array field names are listed to provide context. If a field belongs to an object or an array, the full field name is shown in dot separated notation.

Title		Description	Details
ExternalAccessPolicy			Field Name: ExternalAccessPolicy Type: String
DisplayName		Active Directory display name for the new contact object. This is the name that will also be displayed in Skype for Business.	Field Name: DisplayName Type: String
HostingProvider			Field Name: HostingProvider Type: String
ScopeToSite		If present, the new number will be scoped to the same site as the contact object's home pool. If the ScopeToSite parameter is not included, the new number will be assigned to the global scope.	Field Name: ScopeToSite Type: Boolean
Pool *		Home pool for the new contact object.	Field Name: Pool Type: String
	Regions	Dial plan regions associated with the dial-in number. If a region is not included in at least one dial plan, then it cannot be associated with a dial-in conferencing access number. To specify multiple regions, use a comma-separated list: -Regions "Northwest", "Southwest"	Field Name: Regions.[n] Type: Array
	SecondaryLanguages	Optional collection of languages that can also be used for making dial-in conferencing announcements. Secondary languages must be configured as a comma-separated list of language codes; for example, the following syntax sets French Canadian and French as secondary languages; -SecondaryLanguages "fr-CA", "fr-FR". A single access number can have as many as four secondary languages.	Field Name: SecondaryLanguages.[n] Type: Array
HostingProviderProxyFqdn		Fully qualified domain name of the hosting provider that hosts your dial-in conferencing service.	Field Name: HostingProviderProxyFqdn Type: String
LineUri *			Field Name: LineUri Type: String
DisplayNumber *		Phone number as displayed in meeting invitations and on the dial-in conferencing webpage. The DisplayNumber can be formatted any way you prefer; for example 1-800-555-1234; 1-(800)-555-1234; or 1.800.555.1234.	Field Name: DisplayNumber Type: String
Tenant		Globally unique identifier (GUID) of the Skype for Business Online tenant account for which the new dial-in conferencing access number is being created. For example: -Tenant "38aad667-af54-4397-aaa7-e94c79ec2308" You can return the tenant ID for each of your tenants by running this command: Get-CsTenant \| Select-Object DisplayName, TenantID	Field Name: Tenant Type: String
IsValid			Field Name: IsValid Type: Boolean
PrimaryUri *		Unique SIP address to be assigned to the new contact object. When specifying the PrimaryUri you must include the "sip:" prefix. For example: -PrimaryUri "sip:[email protected]". Note that the sip: prefix must be entered in all lowercase letters.	Field Name: PrimaryUri Type: String
PrimaryLanguage *		Primary language used for making dial-in conferencing announcements. The language must be configured using one of the available dial-in conferencing language codes; for example, en-US for U.S. English; fr-FR for French; etc. To return a list of the available language codes, type the following command at the Windows PowerShell prompt: Get-CsDialInConferencingLanguageList \| Select-Object -ExpandProperty Languages.	Field Name: PrimaryLanguage Type: String
ObjectState			Field Name: ObjectState Type: Integer
Identity			Field Name: Identity Type: String

Model: device/skypeforbusiness/CsDialInConferencingAccessNumber

Model Details: device/skypeforbusiness/CsDialInConferencingAccessNumber