diff --git a/cmd/fleet/serve.go b/cmd/fleet/serve.go
index 826b700d989f..d6a43bbb317d 100644
--- a/cmd/fleet/serve.go
+++ b/cmd/fleet/serve.go
@@ -553,8 +553,8 @@ the way that the Fleet server works.
 				wstepCertManager microsoft_mdm.CertManager
 			)
 
-			// Configuring WSTEP certs if Windows MDM feature flag is enabled
-			if configpkg.IsMDMFeatureFlagEnabled() && config.MDM.IsMicrosoftWSTEPSet() {
+			// Configuring WSTEP certs
+			if config.MDM.IsMicrosoftWSTEPSet() {
 				_, crtPEM, keyPEM, err := config.MDM.MicrosoftWSTEP()
 				if err != nil {
 					initFatal(err, "validate Microsoft WSTEP certificate and key")
diff --git a/cmd/fleetctl/apply_test.go b/cmd/fleetctl/apply_test.go
index 0b0056c23056..6e8dc0913be8 100644
--- a/cmd/fleetctl/apply_test.go
+++ b/cmd/fleetctl/apply_test.go
@@ -14,7 +14,6 @@ import (
 	"path/filepath"
 	"sort"
 	"strconv"
-	"strings"
 	"sync"
 	"testing"
 	"time"
@@ -820,8 +819,6 @@ func mobileconfigForTest(name, identifier string) []byte {
 }
 
 func TestApplyAsGitOps(t *testing.T) {
-	t.Setenv("FLEET_DEV_MDM_ENABLED", "1")
-
 	enqueuer := new(nanomdm_mock.Storage)
 	license := &fleet.LicenseInfo{Tier: fleet.TierPremium, Expiration: time.Now().Add(24 * time.Hour)}
 
@@ -2998,17 +2995,6 @@ spec:
 `, macSetupFile),
 			wantErr: `macOS MDM isn't turned on.`,
 		},
-		{
-			desc: "app config enable windows mdm without feature flag",
-			spec: `
-apiVersion: v1
-kind: config
-spec:
-  mdm:
-    windows_enabled_and_configured: true
-`,
-			wantErr: `422 Validation Failed: cannot enable Windows MDM without the feature flag explicitly enabled`,
-		},
 		{
 			desc: "app config enable windows mdm without WSTEP",
 			spec: `
@@ -3030,12 +3016,6 @@ spec:
 	license := &fleet.LicenseInfo{Tier: fleet.TierPremium, Expiration: time.Now().Add(24 * time.Hour)}
 	for _, c := range cases {
 		t.Run(c.desc, func(t *testing.T) {
-			// bit hacky, but since the env var is temporary while Windows MDM is in beta,
-			// didn't want to add a field to the test cases just for this.
-			if strings.Contains(c.desc, "WSTEP") {
-				t.Setenv("FLEET_DEV_MDM_ENABLED", "1")
-			}
-
 			_, ds := runServerWithMockedDS(t, &service.TestServerOpts{License: license})
 			setupDS(ds)
 			filename := writeTmpYml(t, c.spec)
diff --git a/server/config/config.go b/server/config/config.go
index 62254ba4f176..58f520cd0719 100644
--- a/server/config/config.go
+++ b/server/config/config.go
@@ -1741,13 +1741,3 @@ func SetTestMDMConfig(t testing.TB, cfg *FleetConfig, cert, key []byte, appleBMT
 		t.Fatal(err)
 	}
 }
-
-// Undocumented feature flag for Windows MDM, used to determine if the Windows
-// MDM feature is visible in the UI and can be enabled. More details here:
-// https://github.com/fleetdm/fleet/issues/12257
-//
-// TODO: remove this flag once the Windows MDM feature is ready for
-// release.
-func IsMDMFeatureFlagEnabled() bool {
-	return os.Getenv("FLEET_DEV_MDM_ENABLED") == "1"
-}
diff --git a/server/fleet/app.go b/server/fleet/app.go
index 98580abad39e..4f62e24713b3 100644
--- a/server/fleet/app.go
+++ b/server/fleet/app.go
@@ -172,10 +172,7 @@ type MDM struct {
 // AtLeastOnePlatformEnabledAndConfigured returns true if at least one supported platform
 // (macOS or Windows) has MDM enabled and configured.
 func (m MDM) AtLeastOnePlatformEnabledAndConfigured() bool {
-	// explicitly check for the feature flag to account for the edge case of:
-	// 1. FF enabled, windows is turned on
-	// 2. FF disabled on server restart
-	return m.EnabledAndConfigured || (config.IsMDMFeatureFlagEnabled() && m.WindowsEnabledAndConfigured)
+	return m.EnabledAndConfigured || m.WindowsEnabledAndConfigured
 }
 
 // versionStringRegex is used to validate that a version string is in the x.y.z
diff --git a/server/fleet/app_test.go b/server/fleet/app_test.go
index 79ac1847fa6f..c37a09e14f93 100644
--- a/server/fleet/app_test.go
+++ b/server/fleet/app_test.go
@@ -233,75 +233,36 @@ func TestAtLeastOnePlatformEnabledAndConfigured(t *testing.T) {
 		name                        string
 		macOSEnabledAndConfigured   bool
 		windowsEnabledAndConfigured bool
-		isMDMFeatureFlagEnabled     bool
 		expectedResult              bool
 	}{
 		{
-			name:                        "None enabled, feature flag disabled",
+			name:                        "None enabled",
 			macOSEnabledAndConfigured:   false,
 			windowsEnabledAndConfigured: false,
-			isMDMFeatureFlagEnabled:     false,
 			expectedResult:              false,
 		},
 		{
-			name:                        "MacOS enabled, feature flag disabled",
+			name:                        "MacOS enabled",
 			macOSEnabledAndConfigured:   true,
 			windowsEnabledAndConfigured: false,
-			isMDMFeatureFlagEnabled:     false,
 			expectedResult:              true,
 		},
 		{
-			name:                        "Windows enabled, feature flag disabled",
-			macOSEnabledAndConfigured:   false,
-			windowsEnabledAndConfigured: true,
-			isMDMFeatureFlagEnabled:     false,
-			expectedResult:              false,
-		},
-		{
-			name:                        "Both enabled, feature flag disabled",
+			name:                        "Both enabled",
 			macOSEnabledAndConfigured:   true,
 			windowsEnabledAndConfigured: true,
-			isMDMFeatureFlagEnabled:     false,
-			expectedResult:              true,
-		},
-		{
-			name:                        "None enabled, feature flag enabled",
-			macOSEnabledAndConfigured:   false,
-			windowsEnabledAndConfigured: false,
-			isMDMFeatureFlagEnabled:     true,
-			expectedResult:              false,
-		},
-		{
-			name:                        "MacOS enabled, feature flag enabled",
-			macOSEnabledAndConfigured:   true,
-			windowsEnabledAndConfigured: false,
-			isMDMFeatureFlagEnabled:     true,
 			expectedResult:              true,
 		},
 		{
-			name:                        "Windows enabled, feature flag enabled",
+			name:                        "Windows enabled",
 			macOSEnabledAndConfigured:   false,
 			windowsEnabledAndConfigured: true,
-			isMDMFeatureFlagEnabled:     true,
-			expectedResult:              true,
-		},
-		{
-			name:                        "Both enabled, feature flag enabled",
-			macOSEnabledAndConfigured:   true,
-			windowsEnabledAndConfigured: true,
-			isMDMFeatureFlagEnabled:     true,
 			expectedResult:              true,
 		},
 	}
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			if test.isMDMFeatureFlagEnabled {
-				t.Setenv("FLEET_DEV_MDM_ENABLED", "1")
-			} else {
-				t.Setenv("FLEET_DEV_MDM_ENABLED", "0")
-			}
-
 			mdm := MDM{
 				EnabledAndConfigured:        test.macOSEnabledAndConfigured,
 				WindowsEnabledAndConfigured: test.windowsEnabledAndConfigured,
diff --git a/server/service/appconfig.go b/server/service/appconfig.go
index 97dbdb24d17d..2cedcfc60fc1 100644
--- a/server/service/appconfig.go
+++ b/server/service/appconfig.go
@@ -17,7 +17,6 @@ import (
 	"github.com/fleetdm/fleet/v4/pkg/rawjson"
 	"github.com/fleetdm/fleet/v4/server"
 	"github.com/fleetdm/fleet/v4/server/authz"
-	"github.com/fleetdm/fleet/v4/server/config"
 	authz_ctx "github.com/fleetdm/fleet/v4/server/contexts/authz"
 	"github.com/fleetdm/fleet/v4/server/contexts/ctxerr"
 	"github.com/fleetdm/fleet/v4/server/contexts/license"
@@ -50,17 +49,6 @@ type appConfigResponseFields struct {
 	// SandboxEnabled is true if fleet serve was ran with server.sandbox_enabled=true
 	SandboxEnabled bool  `json:"sandbox_enabled,omitempty"`
 	Err            error `json:"error,omitempty"`
-
-	// MDMEnabled is true if fleet serve was started with
-	// FLEET_DEV_MDM_ENABLED=1.
-	//
-	// Undocumented feature flag for Windows MDM, used to determine if the
-	// Windows MDM feature is visible in the UI and can be enabled. More details
-	// here: https://github.com/fleetdm/fleet/issues/12257
-	//
-	// TODO: remove this flag once the Windows MDM feature is ready for
-	// release.
-	MDMEnabled bool `json:"mdm_enabled,omitempty"`
 }
 
 // UnmarshalJSON implements the json.Unmarshaler interface to make sure we serialize
@@ -185,7 +173,6 @@ func getAppConfigEndpoint(ctx context.Context, request interface{}, svc fleet.Se
 			Logging:         loggingConfig,
 			Email:           emailConfig,
 			SandboxEnabled:  svc.SandboxEnabled(),
-			MDMEnabled:      config.IsMDMFeatureFlagEnabled(),
 		},
 	}
 	return response, nil
@@ -242,9 +229,8 @@ func modifyAppConfigEndpoint(ctx context.Context, request interface{}, svc fleet
 	response := appConfigResponse{
 		AppConfig: *appConfig,
 		appConfigResponseFields: appConfigResponseFields{
-			License:    license,
-			Logging:    loggingConfig,
-			MDMEnabled: config.IsMDMFeatureFlagEnabled(),
+			License: license,
+			Logging: loggingConfig,
 		},
 	}
 
@@ -732,12 +718,6 @@ func (svc *Service) validateMDM(
 	}
 
 	// Windows validation
-	if !config.IsMDMFeatureFlagEnabled() {
-		if mdm.WindowsEnabledAndConfigured {
-			invalid.Append("mdm.windows_enabled_and_configured", "cannot enable Windows MDM without the feature flag explicitly enabled")
-			return
-		}
-	}
 	if !svc.config.MDM.IsMicrosoftWSTEPSet() {
 		if mdm.WindowsEnabledAndConfigured {
 			invalid.Append("mdm.windows_enabled_and_configured", "Couldn't turn on Windows MDM. Please configure Fleet with a certificate and key pair first.")
diff --git a/server/service/integration_core_test.go b/server/service/integration_core_test.go
index 8e7bbef5184c..b5b4488d657e 100644
--- a/server/service/integration_core_test.go
+++ b/server/service/integration_core_test.go
@@ -4977,7 +4977,6 @@ func (s *integrationTestSuite) TestAppConfig() {
 	assert.Equal(t, "free", acResp.License.Tier)
 	assert.Equal(t, "FleetTest", acResp.OrgInfo.OrgName) // set in SetupSuite
 	assert.False(t, acResp.MDM.AppleBMTermsExpired)
-	assert.False(t, acResp.MDMEnabled)
 
 	// set the apple BM terms expired flag, and the enabled and configured flags,
 	// we'll check again at the end of this test to make sure they weren't
@@ -5006,7 +5005,6 @@ func (s *integrationTestSuite) TestAppConfig() {
   }`), http.StatusOK, &acResp)
 	assert.Equal(t, "test", acResp.OrgInfo.OrgName)
 	assert.True(t, acResp.MDM.AppleBMTermsExpired)
-	assert.False(t, acResp.MDMEnabled)
 
 	// the global agent options were not modified by the last call, so the
 	// corresponding activity should not have been created.
@@ -5198,13 +5196,13 @@ func (s *integrationTestSuite) TestAppConfig() {
 		"mdm": { "apple_bm_default_team": "xyz" }
   }`), http.StatusUnprocessableEntity, &acResp)
 
-	// try to enable Windows MDM, impossible without the feature flag
+	// try to enable Windows MDM, impossible without the WSTEP certs
 	// (only set in mdm integrations tests)
 	res = s.Do("PATCH", "/api/latest/fleet/config", json.RawMessage(`{
 		"mdm": { "windows_enabled_and_configured": true }
   }`), http.StatusUnprocessableEntity)
 	errMsg = extractServerErrorText(res.Body)
-	assert.Contains(t, errMsg, "cannot enable Windows MDM without the feature flag explicitly enabled")
+	assert.Contains(t, errMsg, "Please configure Fleet with a certificate and key pair first.")
 
 	// verify that the Apple BM terms expired flag was never modified
 	acResp = appConfigResponse{}
diff --git a/server/service/integration_mdm_test.go b/server/service/integration_mdm_test.go
index e83932e40a56..195f6d978680 100644
--- a/server/service/integration_mdm_test.go
+++ b/server/service/integration_mdm_test.go
@@ -63,8 +63,6 @@ import (
 )
 
 func TestIntegrationsMDM(t *testing.T) {
-	t.Setenv("FLEET_DEV_MDM_ENABLED", "1")
-
 	testingSuite := new(integrationMDMTestSuite)
 	testingSuite.s = &testingSuite.Suite
 	suite.Run(t, testingSuite)
@@ -2493,16 +2491,9 @@ func (s *integrationMDMTestSuite) TestDiskEncryptionSharedSetting() {
 		s.Do("POST", "/api/latest/fleet/spec/teams", teamSpecs, http.StatusOK)
 	}
 
-	// 1. disable both windows and mac mdm
-	// 2. turn off windows feature flag
+	// disable both windows and mac mdm
 	// we should get an error
 	setMDMEnabled(false, false)
-	t.Setenv("FLEET_DEV_MDM_ENABLED", "0")
-	checkConfigSetErrors()
-
-	// turn on windows feature flag
-	// we should get an error
-	t.Setenv("FLEET_DEV_MDM_ENABLED", "1")
 	checkConfigSetErrors()
 
 	// enable windows mdm, no errors
@@ -6646,7 +6637,6 @@ func (s *integrationMDMTestSuite) TestAppConfigWindowsMDM() {
 	// the feature flag is enabled for the MDM test suite
 	var acResp appConfigResponse
 	s.DoJSON("GET", "/api/latest/fleet/config", nil, http.StatusOK, &acResp)
-	assert.True(t, acResp.MDMEnabled)
 	assert.False(t, acResp.MDM.WindowsEnabledAndConfigured)
 
 	// create a couple teams
@@ -6694,7 +6684,6 @@ func (s *integrationMDMTestSuite) TestAppConfigWindowsMDM() {
 		"mdm": { "windows_enabled_and_configured": true }
   }`), http.StatusOK, &acResp)
 	assert.True(t, acResp.MDM.WindowsEnabledAndConfigured)
-	assert.True(t, acResp.MDMEnabled)
 	s.lastActivityOfTypeMatches(fleet.ActivityTypeEnabledWindowsMDM{}.ActivityName(), `{}`, 0)
 
 	// get the orbit config for each host, verify that only the expected ones
diff --git a/server/service/orbit.go b/server/service/orbit.go
index 017b530a2f2c..b4b1f63244ed 100644
--- a/server/service/orbit.go
+++ b/server/service/orbit.go
@@ -8,7 +8,6 @@ import (
 	"time"
 
 	"github.com/fleetdm/fleet/v4/server"
-	"github.com/fleetdm/fleet/v4/server/config"
 	"github.com/fleetdm/fleet/v4/server/contexts/ctxerr"
 	hostctx "github.com/fleetdm/fleet/v4/server/contexts/host"
 	"github.com/fleetdm/fleet/v4/server/contexts/license"
@@ -218,7 +217,7 @@ func (svc *Service) GetOrbitConfig(ctx context.Context) (fleet.OrbitConfig, erro
 			notifs.NeedsProgrammaticWindowsMDMEnrollment = true
 		}
 	}
-	if config.IsMDMFeatureFlagEnabled() && !appConfig.MDM.WindowsEnabledAndConfigured {
+	if !appConfig.MDM.WindowsEnabledAndConfigured {
 		if host.IsEligibleForWindowsMDMUnenrollment() {
 			notifs.NeedsProgrammaticWindowsMDMUnenrollment = true
 		}
@@ -271,8 +270,7 @@ func (svc *Service) GetOrbitConfig(ctx context.Context) (fleet.OrbitConfig, erro
 			}
 		}
 
-		if config.IsMDMFeatureFlagEnabled() &&
-			mdmConfig.EnableDiskEncryption &&
+		if mdmConfig.EnableDiskEncryption &&
 			host.IsEligibleForBitLockerEncryption() {
 			notifs.EnforceBitLockerEncryption = true
 		}
@@ -308,7 +306,6 @@ func (svc *Service) GetOrbitConfig(ctx context.Context) (fleet.OrbitConfig, erro
 	}
 
 	if appConfig.MDM.WindowsEnabledAndConfigured &&
-		config.IsMDMFeatureFlagEnabled() &&
 		appConfig.MDM.EnableDiskEncryption.Value &&
 		host.IsEligibleForBitLockerEncryption() {
 		notifs.EnforceBitLockerEncryption = true
diff --git a/terraform/addons/mdm/outputs.tf b/terraform/addons/mdm/outputs.tf
index 90dbc56a28de..485b3f3e9fed 100644
--- a/terraform/addons/mdm/outputs.tf
+++ b/terraform/addons/mdm/outputs.tf
@@ -1,3 +1,4 @@
+// TODO: the feature flag here should also be removed, maybe in a distinct PR (reviewed by infra)
 output "extra_environment_variables" {
   value = merge(var.enable_apple_mdm == false ? {} : {
     FLEET_MDM_APPLE_SERVER_ADDRESS = var.public_domain_name