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
FirstTimeUser *		Field Name: FirstTimeUser Type: Boolean
PinExpired *	The PINExpired parameter specifies whether the PIN is treated as expired. If this parameter is supplied and is set to $false, the user isn't required to reset the PIN the next time that the user logs on. If the PIN isn't supplied, the PIN is treated as expired and the user is prompted to reset the PIN the next time that the user logs on.	Field Name: PinExpired Type: Boolean
IsValid *		Field Name: IsValid Type: Boolean
PSComputerName		Field Name: PSComputerName Type: String
UserID *		Field Name: UserID Type: String
ObjectState *		Field Name: ObjectState Type: String
LockedOut *	The LockedOut parameter specifies whether the mailbox will continue to be locked. If set to $true, the mailbox is marked as locked out. By default, if this parameter is omitted or set to $false, the command clears the locked-out status on the mailbox.	Field Name: LockedOut Type: Boolean
RunspaceId		Field Name: RunspaceId Type: String
PSShowComputerName		Field Name: PSShowComputerName Type: Boolean
Identity *	The Identity parameter specifies the identifier that can be used to retrieve information about the mailbox. The values for this parameter include the following: ADObjectID GUID Distinguished name (DN) Domain\Account User principal name (UPN) LegacyExchangeDN SmtpAddress Alias	Field Name: Identity Type: String

Model: device/exchange/UMMailboxPIN