Microsoft Entra ID must automatically disable accounts after a 35-day period of account inactivity.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-270204	SRG-APP-000025	ENTR-ID-000090	SV-270204r1085660_rule	2025-03-17	1

Description
Attackers that are able to exploit an inactive account can potentially obtain and maintain undetected access to an application. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Applications need to track periods of user inactivity and disable accounts after 35 days of inactivity. Such a process greatly reduces the risk that accounts will be hijacked, leading to a data compromise. To address access requirements, many application developers choose to integrate their applications with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements. Such integration allows the application developer to offload those access control functions and focus on core application features and functionality. This policy does not apply to either emergency accounts or infrequently used accounts. Infrequently used accounts are local login administrator accounts used by system administrators when network or normal logon/access is not available. Emergency accounts are administrator accounts created in response to crisis situations. References: https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.users/get-mguser?view=graph-powershell-1.0 https://learn.microsoft.com/en-us/graph/api/user-list?view=graph-rest-1.0&tabs=http https://learn.microsoft.com/en-us/graph/api/resources/user?view=graph-rest-1.0#properties https://learn.microsoft.com/en-us/graph/api/resources/signinactivity?view=graph-rest-1.0#properties For any PowerShell scripts that are Graph, note that Graph endpoints differ depending on where the tenant is located. - For commercial tenants, graph endpoints are graph.microsoft.com. - For GCC High tenants (IL4), graph endpoints are graph.microsoft.us. - For DOD tenants (IL5), graph endpoints are dod-graph.microsoft.us. Satisfies: SRG-APP-000025, SRG-APP-000163

Description

Attackers that are able to exploit an inactive account can potentially obtain and maintain undetected access to an application. Owners of inactive accounts will not notice if unauthorized access to their user account has been obtained. Applications need to track periods of user inactivity and disable accounts after 35 days of inactivity. Such a process greatly reduces the risk that accounts will be hijacked, leading to a data compromise. To address access requirements, many application developers choose to integrate their applications with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements. Such integration allows the application developer to offload those access control functions and focus on core application features and functionality. This policy does not apply to either emergency accounts or infrequently used accounts. Infrequently used accounts are local login administrator accounts used by system administrators when network or normal logon/access is not available. Emergency accounts are administrator accounts created in response to crisis situations. References: https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.users/get-mguser?view=graph-powershell-1.0 https://learn.microsoft.com/en-us/graph/api/user-list?view=graph-rest-1.0&tabs=http https://learn.microsoft.com/en-us/graph/api/resources/user?view=graph-rest-1.0#properties https://learn.microsoft.com/en-us/graph/api/resources/signinactivity?view=graph-rest-1.0#properties For any PowerShell scripts that are Graph, note that Graph endpoints differ depending on where the tenant is located. - For commercial tenants, graph endpoints are graph.microsoft.com. - For GCC High tenants (IL4), graph endpoints are graph.microsoft.us. - For DOD tenants (IL5), graph endpoints are dod-graph.microsoft.us. Satisfies: SRG-APP-000025, SRG-APP-000163

ℹ️ Check
Verify Entra ID disables accounts after 35 days of inactivity. Use the following procedure to discover inactive user accounts in Entra ID (35+ days) via the use of the Graph PowerShell SDK. Installation instructions: https://learn.microsoft.com/en-us/powershell/microsoftgraph/installation?view=graph-powershell-1.0 Required roles: At least Global Reader Required tenant license: Entra ID Premium P1 Example PowerShell commands: Connect-MgGraph -Scopes AuditLog.Read.All,User.Read.All -Environment USGov $inactiveDate = (Get-Date).AddDays(-35) $users = Get-MgUser -All:$true -Property Id, DisplayName, UserPrincipalName, UserType, createdDateTime, SignInActivity, AccountEnabled \| Where-Object { $_.AccountEnabled -eq $true } $inactiveUsers = $users \| Where-Object { ($_.SignInActivity.LastSignInDateTime -lt $inactiveDate) -or ($_.SignInActivity.LastSignInDateTime -eq $null -and $_.CreatedDateTime -lt $inactiveDate) } \| Select-Object DisplayName, UserPrincipalName, UserType, createdDateTime, @{Name = 'LastSignInDateTime'; Expression = {($_.SignInActivity).LastSignInDateTime}}, Id \| Sort-Object LastSignInDateTime $inactiveUsers \| Format-Table -AutoSize If accounts are not disabled after a 35-day period of account inactivity, this is a finding.

ℹ️ Check

Verify Entra ID disables accounts after 35 days of inactivity. Use the following procedure to discover inactive user accounts in Entra ID (35+ days) via the use of the Graph PowerShell SDK. Installation instructions: https://learn.microsoft.com/en-us/powershell/microsoftgraph/installation?view=graph-powershell-1.0 Required roles: At least Global Reader Required tenant license: Entra ID Premium P1 Example PowerShell commands: Connect-MgGraph -Scopes AuditLog.Read.All,User.Read.All -Environment USGov $inactiveDate = (Get-Date).AddDays(-35) $users = Get-MgUser -All:$true -Property Id, DisplayName, UserPrincipalName, UserType, createdDateTime, SignInActivity, AccountEnabled | Where-Object { $_.AccountEnabled -eq $true } $inactiveUsers = $users | Where-Object { ($_.SignInActivity.LastSignInDateTime -lt $inactiveDate) -or ($_.SignInActivity.LastSignInDateTime -eq $null -and $_.CreatedDateTime -lt $inactiveDate) } | Select-Object DisplayName, UserPrincipalName, UserType, createdDateTime, @{Name = 'LastSignInDateTime'; Expression = {($_.SignInActivity).LastSignInDateTime}}, Id | Sort-Object LastSignInDateTime $inactiveUsers | Format-Table -AutoSize If accounts are not disabled after a 35-day period of account inactivity, this is a finding.

✔️ Fix
1. Sign in to the Microsoft Entra admin center as at least a Reports Reader. 2. Browse to Identity >> Users >> All users. 3. Select a user from the list. 4. Use the following procedure to disable inactive user accounts in Entra ID via the use of the Graph PowerShell SDK. Installation instructions: https://learn.microsoft.com/en-us/powershell/microsoftgraph/installation?view=graph-powershell-1.0 Required roles: Global Administrator Install the Microsoft Graph PowerShell SDK. Install-Module Microsoft.Graph -Scope CurrentUser Connect-MgGraph -Scopes "User.ReadWrite.All", "Directory.ReadWrite.All", "SignInActivity.Read.All" # Set the inactivity threshold (in days) $inactivityThreshold = 35 # Get the current date $currentDate = Get-Date # Get all users and their last sign-in activity $users = Get-MgUser -All -Property "DisplayName", "SignInActivity" # Filter for inactive users $inactiveUsers = $users \| Where-Object { $_.SignInActivity.LastSignInDateTime -lt ($currentDate.AddDays(-$inactivityThreshold)) } # Disable inactive users foreach ($user in $inactiveUsers) { Set-MgUser -UserId $user.Id -AccountEnabled $false Write-Host "Disabled user: $($user.DisplayName)" }

✔️ Fix

1. Sign in to the Microsoft Entra admin center as at least a Reports Reader. 2. Browse to Identity >> Users >> All users. 3. Select a user from the list. 4. Use the following procedure to disable inactive user accounts in Entra ID via the use of the Graph PowerShell SDK. Installation instructions: https://learn.microsoft.com/en-us/powershell/microsoftgraph/installation?view=graph-powershell-1.0 Required roles: Global Administrator Install the Microsoft Graph PowerShell SDK. Install-Module Microsoft.Graph -Scope CurrentUser Connect-MgGraph -Scopes "User.ReadWrite.All", "Directory.ReadWrite.All", "SignInActivity.Read.All" # Set the inactivity threshold (in days) $inactivityThreshold = 35 # Get the current date $currentDate = Get-Date # Get all users and their last sign-in activity $users = Get-MgUser -All -Property "DisplayName", "SignInActivity" # Filter for inactive users $inactiveUsers = $users | Where-Object { $_.SignInActivity.LastSignInDateTime -lt ($currentDate.AddDays(-$inactivityThreshold)) } # Disable inactive users foreach ($user in $inactiveUsers) { Set-MgUser -UserId $user.Id -AccountEnabled $false Write-Host "Disabled user: $($user.DisplayName)" }