Trying to disable Microsoft Accounts in Windows. Followed these instructions within GPO:
Expand Computer Configuration->Policies->Windows Settings->Security Settings->Local Policies->Security Options
Double-click Accounts: Block Microsoft accounts, and checkmark Define this policy setting. In the drop-down menu, select Users can’t add or log on with Microsoft accounts, and click OK.
But the Accounts: Block Microsoft accounts is not listed in the GPO. See screen shot attached.