您好 ，
请尝试修改以下的注册表键值：
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System
AllowDomainPINLogon DWORD
0 or (delete) = Disable
1 = Enable
=======================================================================
将键值改成1或者是00000001以允许域账户设置PIN码，您可以参考以下的文章：
PIN and Fingerprint Sign-in options unavailable (greyed out) in Windows 10 1607 Enterprise
https://social.technet.microsoft.com/Forums/en-US/84a0bd50-1360-4a94-bfb3-b049ecace521/pin-and-fingerprint-signin-options-unavailable-greyed-out-in-windows-10-1607-enterprise?forum=win10itprogeneral
请注意：涉及到修改注册表，请提前备份好注册表，以防止出现问题。
另外，如果回复对您有帮助的话，您可以把回复标记为答复，感谢您的理解和支持。
此致
Candy
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