Use of Microsoft accounts to log on must be blocked.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-36771	WN08-SO-000002	SV-48457r2_rule	IAIA-1	Medium

Description
Control of logon credentials and the system must be maintained within the enterprise. Linking an account to an outside vendor could provide an opening if the account is compromised.

STIG	Date
Windows 8/8.1 Security Technical Implementation Guide	2017-05-17

Details

Check Text ( C-45120r2_chk )
Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Accounts: Block Microsoft accounts" is not set to "Users can't add or log on with Microsoft accounts", this is a finding.

Check Text ( C-45120r2_chk )

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.)
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for "Accounts: Block Microsoft accounts" is not set to "Users can't add or log on with Microsoft accounts", this is a finding.

Fix Text (F-41584r2_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Accounts: Block Microsoft accounts" to "Users can't add or log on with Microsoft accounts".