diff --git a/src/ZB.MOM.WW.MxGateway.Server/Configuration/LdapOptions.cs b/src/ZB.MOM.WW.MxGateway.Server/Configuration/LdapOptions.cs
index 2f69026..e86d26c 100644
--- a/src/ZB.MOM.WW.MxGateway.Server/Configuration/LdapOptions.cs
+++ b/src/ZB.MOM.WW.MxGateway.Server/Configuration/LdapOptions.cs
@@ -2,6 +2,31 @@ using ZB.MOM.WW.Auth.Abstractions.Ldap;
 
 namespace ZB.MOM.WW.MxGateway.Server.Configuration;
 
+/// <summary>
+/// Gateway-side view of the <c>MxGateway:Ldap</c> section. This is a SHADOW of the
+/// shared <see cref="ZB.MOM.WW.Auth.Abstractions.Ldap.LdapOptions"/> type and is NOT
+/// used to perform LDAP authentication at runtime — runtime bind/search is done by the
+/// shared <c>ZB.MOM.WW.Auth.Ldap</c> provider, whose options are bound directly from the
+/// same <c>MxGateway:Ldap</c> section by <c>AddZbLdapAuth</c> (see
+/// <see cref="ZB.MOM.WW.MxGateway.Server.Dashboard.DashboardServiceCollectionExtensions"/>).
+/// <para>
+/// This shadow exists for three things only: (1) startup validation via
+/// <see cref="GatewayOptionsValidator"/>; (2) the redacted effective-config display
+/// (<see cref="EffectiveLdapConfiguration"/> / <see cref="GatewayConfigurationProvider"/>);
+/// and (3) it is the single home of the gateway's dev/default LDAP values, which the
+/// integration live-test helper copies onto the shared options.
+/// </para>
+/// <para>
+/// Review C2 — DRIFT WARNING: this class MUST stay field-compatible with the shared
+/// <see cref="ZB.MOM.WW.Auth.Abstractions.Ldap.LdapOptions"/> so the one config section
+/// binds cleanly onto both. The two are intentionally NOT merged because their defaults
+/// differ on purpose: this shadow ships dev-friendly defaults (plaintext localhost,
+/// <c>AllowInsecure=true</c>, populated <c>SearchBase</c>/<c>ServiceAccount*</c>), whereas
+/// the shared type is secure-by-default (<c>Transport=Ldaps</c>, <c>AllowInsecure=false</c>,
+/// empty DN fields). If you add/rename/remove a field on the shared type, mirror it here
+/// (and in the validator + effective-config) so the section keeps binding to both.
+/// </para>
+/// </summary>
 public sealed class LdapOptions
 {
     /// <summary>Gets a value indicating whether LDAP authentication is enabled.</summary>
diff --git a/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardAuthenticator.cs b/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardAuthenticator.cs
index 93efe70..47c211a 100644
--- a/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardAuthenticator.cs
+++ b/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardAuthenticator.cs
@@ -72,6 +72,23 @@ public sealed class DashboardAuthenticator(
             roles));
     }
 
+    /// <summary>
+    /// Builds the dashboard <see cref="ClaimsPrincipal"/> from the LDAP outcome.
+    /// </summary>
+    /// <param name="username">The (trimmed) login name → <see cref="ClaimTypes.NameIdentifier"/>.</param>
+    /// <param name="displayName">The user's display name → <see cref="ClaimTypes.Name"/>.</param>
+    /// <param name="groups">
+    /// The user's LDAP groups, as returned by <see cref="ILdapAuthService"/>. NOTE
+    /// (review C1): these are <b>already-normalized short RDN names</b> (e.g.
+    /// <c>GwAdmin</c>), not raw distinguished names. The shared
+    /// <c>ZB.MOM.WW.Auth.Ldap</c> provider strips each group DN to its first RDN
+    /// value before returning it, so the <see cref="DashboardAuthenticationDefaults.LdapGroupClaimType"/>
+    /// claim carries the short name. This differs from the pre-cutover behaviour,
+    /// which surfaced the raw <c>memberOf</c> values (full DNs) on the claim; the
+    /// claim is informational only (no policy or UI reads its value — authorization
+    /// is role-based), so the shape change is non-breaking for dashboard consumers.
+    /// </param>
+    /// <param name="roles">The dashboard roles resolved from <paramref name="groups"/>.</param>
     private static ClaimsPrincipal CreatePrincipal(
         string username,
         string displayName,
@@ -85,6 +102,8 @@ public sealed class DashboardAuthenticator(
         ];
 
         claims.AddRange(roles.Select(role => new Claim(ClaimTypes.Role, role)));
+        // Groups are short RDN names from ILdapAuthService (see param doc above), so
+        // this claim value is the short group name, not the original DN.
         claims.AddRange(groups.Select(group => new Claim(
             DashboardAuthenticationDefaults.LdapGroupClaimType,
             group)));
diff --git a/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardGroupRoleMapping.cs b/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardGroupRoleMapping.cs
index f02b9b7..2fa1029 100644
--- a/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardGroupRoleMapping.cs
+++ b/src/ZB.MOM.WW.MxGateway.Server/Dashboard/DashboardGroupRoleMapping.cs
@@ -36,6 +36,19 @@ internal static class DashboardGroupRoleMapping
             // "ou=GwAdmin,ou=groups,..."). The map's comparer is
             // OrdinalIgnoreCase (see DashboardOptions.GroupToRole), so e.g.
             // "GwAdmin" and "gwadmin" both match.
+            //
+            // Review C1: with the shared ZB.MOM.WW.Auth.Ldap provider, groups
+            // arrive here already stripped to short RDN names (the library calls
+            // FirstRdnValue before returning them). So through the live login path
+            // the full-string branch only ever sees short names and the RDN
+            // fallback is effectively a no-op — they collapse to the same key.
+            // The fallback is retained because this mapping is also reachable
+            // directly via the IGroupRoleMapper<string> seam (DashboardGroupRoleMapper),
+            // where a caller could still pass a full DN. CONSEQUENCE: configuring a
+            // full-DN GroupToRole *key* (e.g. "ou=GwAdmin,ou=groups,...") is
+            // UNSUPPORTED with the shared library — the incoming group is a short
+            // name, so it will never equal a full-DN key. Keep GroupToRole keys as
+            // short group names.
             if (groupToRole.TryGetValue(normalizedGroup, out string? mapped)
                 || groupToRole.TryGetValue(ExtractFirstRdnValue(normalizedGroup), out mapped))
             {
diff --git a/src/ZB.MOM.WW.MxGateway.Server/ZB.MOM.WW.MxGateway.Server.csproj b/src/ZB.MOM.WW.MxGateway.Server/ZB.MOM.WW.MxGateway.Server.csproj
index fdeaacb..7fc4ca6 100644
--- a/src/ZB.MOM.WW.MxGateway.Server/ZB.MOM.WW.MxGateway.Server.csproj
+++ b/src/ZB.MOM.WW.MxGateway.Server/ZB.MOM.WW.MxGateway.Server.csproj
@@ -6,9 +6,9 @@
 
   <ItemGroup>
     <PackageReference Include="Grpc.AspNetCore" Version="2.76.0" />
-    <PackageReference Include="ZB.MOM.WW.Auth.Abstractions" Version="0.1.0" />
-    <PackageReference Include="ZB.MOM.WW.Auth.Ldap" Version="0.1.0" />
-    <PackageReference Include="ZB.MOM.WW.Auth.AspNetCore" Version="0.1.0" />
+    <PackageReference Include="ZB.MOM.WW.Auth.Abstractions" Version="0.1.1" />
+    <PackageReference Include="ZB.MOM.WW.Auth.Ldap" Version="0.1.1" />
+    <PackageReference Include="ZB.MOM.WW.Auth.AspNetCore" Version="0.1.1" />
     <PackageReference Include="ZB.MOM.WW.Configuration" Version="0.1.0" />
     <PackageReference Include="ZB.MOM.WW.Health" Version="0.1.0" />
     <PackageReference Include="ZB.MOM.WW.Telemetry" Version="0.1.0" />
diff --git a/src/ZB.MOM.WW.MxGateway.Tests/Gateway/Dashboard/DashboardAuthenticatorTests.cs b/src/ZB.MOM.WW.MxGateway.Tests/Gateway/Dashboard/DashboardAuthenticatorTests.cs
index a7598fe..49ba362 100644
--- a/src/ZB.MOM.WW.MxGateway.Tests/Gateway/Dashboard/DashboardAuthenticatorTests.cs
+++ b/src/ZB.MOM.WW.MxGateway.Tests/Gateway/Dashboard/DashboardAuthenticatorTests.cs
@@ -81,9 +81,10 @@ public sealed class DashboardAuthenticatorTests
     }
 
     /// <summary>
-    /// On success the principal carries the resolved roles, the raw LDAP-group claims,
-    /// the display name (ClaimTypes.Name), and the username (ClaimTypes.NameIdentifier),
-    /// under the dashboard authentication scheme — the exact shape produced before the cutover.
+    /// On success the principal carries the resolved roles, the LDAP-group claims
+    /// (short RDN names as returned by <see cref="ILdapAuthService"/>), the display
+    /// name (ClaimTypes.Name), and the username (ClaimTypes.NameIdentifier), under the
+    /// dashboard authentication scheme.
     /// </summary>
     [Fact]
     public async Task AuthenticateAsync_Success_BuildsPrincipalWithExpectedClaims()
@@ -115,7 +116,8 @@ public sealed class DashboardAuthenticatorTests
         Assert.True(principal.IsInRole(DashboardRoles.Admin));
         Assert.True(principal.IsInRole(DashboardRoles.Viewer));
 
-        // Raw LDAP groups are surfaced under the dedicated group claim type.
+        // LDAP groups (already short RDN names from the service) are surfaced under
+        // the dedicated group claim type.
         IReadOnlyList<string> groupClaims = principal.FindAll(
                 DashboardAuthenticationDefaults.LdapGroupClaimType)
             .Select(claim => claim.Value)
@@ -146,11 +148,22 @@ public sealed class DashboardAuthenticatorTests
     }
 
     /// <summary>
-    /// A group supplied as a full distinguished name still resolves to its role via the
-    /// mapper's leading-RDN fallback, and the original DN is preserved on the group claim.
+    /// Direct-injection path only (review C1): when an <see cref="ILdapAuthService"/>
+    /// implementation hands the authenticator a full distinguished name as a group, the
+    /// mapper's leading-RDN fallback still resolves the role, and whatever string the
+    /// service supplied is surfaced verbatim on the group claim.
+    /// <para>
+    /// This is NOT the real production flow. The shared <c>ZB.MOM.WW.Auth.Ldap</c>
+    /// provider strips each group DN to its short RDN name before returning it, so the
+    /// authenticator never receives a full DN from the real library and the group claim
+    /// in production carries the short name (e.g. <c>GwAdmin</c>), not the DN. This test
+    /// uses a fake service to exercise only the authenticator's own pass-through of group
+    /// values; see <see cref="AuthenticateAsync_Success_BuildsPrincipalWithExpectedClaims"/>
+    /// for the realistic (already-short) group shape.
+    /// </para>
     /// </summary>
     [Fact]
-    public async Task AuthenticateAsync_GroupAsDistinguishedName_ResolvesRoleAndPreservesGroupClaim()
+    public async Task AuthenticateAsync_GroupAsDistinguishedNameFromService_ResolvesRoleAndSurfacesServiceValue()
     {
         const string groupDn = "ou=GwAdmin,ou=groups,dc=lmxopcua,dc=local";
         FakeLdapAuthService ldap = new(LdapAuthResult.Success(
@@ -166,7 +179,10 @@ public sealed class DashboardAuthenticatorTests
 
         Assert.True(result.Succeeded);
         ClaimsPrincipal principal = Assert.IsType<ClaimsPrincipal>(result.Principal);
+        // Role resolves via the leading-RDN fallback in DashboardGroupRoleMapping.
         Assert.True(principal.IsInRole(DashboardRoles.Admin));
+        // The authenticator surfaces the value the (fake) service returned, verbatim.
+        // With the real library this value would already be the short RDN ("GwAdmin").
         Assert.Contains(
             principal.FindAll(DashboardAuthenticationDefaults.LdapGroupClaimType),
             claim => claim.Value == groupDn);