diff --git a/src/DataverseProxyGenerator.Core/Domain/BooleanManagedColumnModel.cs b/src/DataverseProxyGenerator.Core/Domain/BooleanManagedColumnModel.cs
new file mode 100644
index 0000000..fceefbe
--- /dev/null
+++ b/src/DataverseProxyGenerator.Core/Domain/BooleanManagedColumnModel.cs
@@ -0,0 +1,5 @@
+namespace DataverseProxyGenerator.Core.Domain;
+
+public record BooleanManagedColumnModel() : ManagedColumnModel("bool", IsNullable: false)
+{
+}
\ No newline at end of file
diff --git a/src/DataverseProxyGenerator.Core/Domain/ManagedColumnModel.cs b/src/DataverseProxyGenerator.Core/Domain/ManagedColumnModel.cs
new file mode 100644
index 0000000..21696b3
--- /dev/null
+++ b/src/DataverseProxyGenerator.Core/Domain/ManagedColumnModel.cs
@@ -0,0 +1,6 @@
+namespace DataverseProxyGenerator.Core.Domain;
+
+public record ManagedColumnModel(string ReturnType, bool IsNullable) : ColumnModel
+{
+    public string FullReturnType => IsNullable && ReturnType != "string" ? ReturnType + "?" : ReturnType;
+}
\ No newline at end of file
diff --git a/src/DataverseProxyGenerator.Core/Domain/UniqueIdentifierColumnModel.cs b/src/DataverseProxyGenerator.Core/Domain/UniqueIdentifierColumnModel.cs
new file mode 100644
index 0000000..bdfc0ae
--- /dev/null
+++ b/src/DataverseProxyGenerator.Core/Domain/UniqueIdentifierColumnModel.cs
@@ -0,0 +1,5 @@
+namespace DataverseProxyGenerator.Core.Domain;
+
+public record UniqueIdentifierColumnModel : ColumnModel
+{
+}
\ No newline at end of file
diff --git a/src/DataverseProxyGenerator.Core/Metadata/DataverseMetadataFetcher.cs b/src/DataverseProxyGenerator.Core/Metadata/DataverseMetadataFetcher.cs
index e851be6..1c7757e 100644
--- a/src/DataverseProxyGenerator.Core/Metadata/DataverseMetadataFetcher.cs
+++ b/src/DataverseProxyGenerator.Core/Metadata/DataverseMetadataFetcher.cs
@@ -188,7 +188,7 @@ private TableModel BuildTableModelFromMetadata(Dictionary<string, EntityMetadata
         };
 
         var validAttributes = entityMetadata.Attributes
-            .Where(x => x.AttributeOf == null)
+            .Where(x => x.AttributeOf == null && x.LogicalName != entityMetadata.PrimaryIdAttribute)
             .ToList();
 
         foreach (var attr in validAttributes)
@@ -225,6 +225,9 @@ private TableModel BuildTableModelFromMetadata(Dictionary<string, EntityMetadata
             LookupAttributeMetadata lookupAttr => BuildLookupColumn(lookupAttr),
             FileAttributeMetadata fileAttr => BuildFileColumn(fileAttr),
             ImageAttributeMetadata imageAttr => BuildImageColumn(imageAttr),
+            ManagedPropertyAttributeMetadata managedAttr => BuildManagedPropertyColumn(managedAttr),
+            UniqueIdentifierAttributeMetadata uniqueAttr => BuildUniqueIdentifierColumn(uniqueAttr),
+            AttributeMetadata attrAttr when attrAttr.AttributeType == AttributeTypeCode.Uniqueidentifier => BuildUniqueIdentifierColumn(attrAttr),
             _ => null,
         };
 
@@ -451,6 +454,49 @@ private static Dictionary<int, Dictionary<int, string>> BuildOptionLocalizations
         Description = ApplyLabelMapping(attr.Description?.UserLocalizedLabel?.Label ?? string.Empty),
     };
 
+    private ManagedColumnModel? BuildManagedPropertyColumn(ManagedPropertyAttributeMetadata attr)
+    {
+        return attr.ValueAttributeTypeCode switch
+        {
+            AttributeTypeCode.Boolean => BuildBooleanManagedColumnModel(attr),
+            AttributeTypeCode.DateTime => BuildManagedColumnModel(attr, "DateTime", nullable: true),
+            AttributeTypeCode.Decimal => BuildManagedColumnModel(attr, "decimal", nullable: true),
+            AttributeTypeCode.Double => BuildManagedColumnModel(attr, "double", nullable: true),
+            AttributeTypeCode.Integer => BuildManagedColumnModel(attr, "int", nullable: true),
+            AttributeTypeCode.BigInt => BuildManagedColumnModel(attr, "long", nullable: true),
+            AttributeTypeCode.Lookup => BuildManagedColumnModel(attr, "EntityReference", nullable: true),
+            AttributeTypeCode.Money => BuildManagedColumnModel(attr, "decimal", nullable: true),
+            AttributeTypeCode.Memo => BuildManagedColumnModel(attr, "string"),
+            AttributeTypeCode.PartyList => BuildManagedColumnModel(attr, "IEnumerable<ActivityParty>"),
+            AttributeTypeCode.String => BuildManagedColumnModel(attr, "string"),
+            _ => null,
+        };
+    }
+
+    private ManagedColumnModel BuildManagedColumnModel(AttributeMetadata attr, string returnType, bool nullable = false) => new ManagedColumnModel(returnType, nullable)
+    {
+        LogicalName = attr.LogicalName,
+        SchemaName = attr.SchemaName,
+        DisplayName = ApplyLabelMapping(attr.DisplayName?.UserLocalizedLabel?.Label ?? attr.LogicalName),
+        Description = ApplyLabelMapping(attr.Description?.UserLocalizedLabel?.Label ?? string.Empty),
+    };
+
+    private BooleanManagedColumnModel BuildBooleanManagedColumnModel(AttributeMetadata attr) => new BooleanManagedColumnModel
+    {
+        LogicalName = attr.LogicalName,
+        SchemaName = attr.SchemaName,
+        DisplayName = ApplyLabelMapping(attr.DisplayName?.UserLocalizedLabel?.Label ?? attr.LogicalName),
+        Description = ApplyLabelMapping(attr.Description?.UserLocalizedLabel?.Label ?? string.Empty),
+    };
+
+    private UniqueIdentifierColumnModel BuildUniqueIdentifierColumn(AttributeMetadata attr) => new UniqueIdentifierColumnModel
+    {
+        LogicalName = attr.LogicalName,
+        SchemaName = attr.SchemaName,
+        DisplayName = ApplyLabelMapping(attr.DisplayName?.UserLocalizedLabel?.Label ?? attr.LogicalName),
+        Description = ApplyLabelMapping(attr.Description?.UserLocalizedLabel?.Label ?? string.Empty),
+    };
+
     private static void MapRelationships(Dictionary<string, EntityMetadata> logicalNameToMetadata, EntityMetadata entityMetadata, TableModel table)
     {
         MapManyToOne(logicalNameToMetadata, entityMetadata, table);
diff --git a/src/DataverseProxyGenerator.Core/Templates/Body/EntityClass.scriban-cs b/src/DataverseProxyGenerator.Core/Templates/Body/EntityClass.scriban-cs
index abca4ee..6c8c8de 100644
--- a/src/DataverseProxyGenerator.Core/Templates/Body/EntityClass.scriban-cs
+++ b/src/DataverseProxyGenerator.Core/Templates/Body/EntityClass.scriban-cs
@@ -130,6 +130,24 @@ public partial class {{table.SchemaName}} : ExtendedEntity{{ if table.Interfaces
         get => GetAttributeValue<byte[]>("{{column.LogicalName}}");
         set => SetAttributeValue("{{column.LogicalName}}", value);
     }
+    {{~ else if column.TypeName == "UniqueIdentifierColumnModel" ~}}
+    public Guid? {{column.SchemaName}}
+    {
+        get => GetAttributeValue<Guid?>("{{column.LogicalName}}");
+        set => SetAttributeValue("{{column.LogicalName}}", value);
+    }
+    {{~ else if column.TypeName == "BooleanManagedColumnModel" ~}}
+    public BooleanManagedProperty {{column.SchemaName}}
+    {
+        get => GetAttributeValue<BooleanManagedProperty>("{{column.LogicalName}}");
+        set => SetAttributeValue("{{column.LogicalName}}", value);
+    }
+    {{~ else if column.TypeName == "ManagedColumnModel" ~}}
+    public ManagedProperty<{{column.FullReturnType}}> {{column.SchemaName}}
+    {
+        get => GetAttributeValue<ManagedProperty<{{column.FullReturnType}}>>("{{column.LogicalName}}");
+        set => SetAttributeValue("{{column.LogicalName}}", value);
+    }
     {{~ else if column.TypeName == "PrimaryIdColumnModel" ~}}
     public Guid {{column.SchemaName}}
     {
diff --git a/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.Generates_Correct_Code_For_All_AttributeTypes.verified.txt b/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.Generates_Correct_Code_For_All_AttributeTypes.verified.txt
index a36ffcb..9b5f4f8 100644
--- a/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.Generates_Correct_Code_For_All_AttributeTypes.verified.txt
+++ b/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.Generates_Correct_Code_For_All_AttributeTypes.verified.txt
@@ -115,6 +115,28 @@ public partial class TestEntity : ExtendedEntity
         set => SetAttributeValue("isactive", value);
     }
 
+    /// <summary>
+    /// <para>Display Name: A Managed Boolean Attribute</para>
+    /// </summary>
+    [AttributeLogicalName("managedbooleanattribute")]
+    [DisplayName("A Managed Boolean Attribute")]
+    public BooleanManagedProperty ManagedBooleanAttribute
+    {
+        get => GetAttributeValue<BooleanManagedProperty>("managedbooleanattribute");
+        set => SetAttributeValue("managedbooleanattribute", value);
+    }
+
+    /// <summary>
+    /// <para>Display Name: A Managed DateTime Attribute</para>
+    /// </summary>
+    [AttributeLogicalName("manageddatetimeattribute")]
+    [DisplayName("A Managed DateTime Attribute")]
+    public ManagedProperty<DateTime?> ManagedDateTimeAttribute
+    {
+        get => GetAttributeValue<ManagedProperty<DateTime?>>("manageddatetimeattribute");
+        set => SetAttributeValue("manageddatetimeattribute", value);
+    }
+
     /// <summary>
     /// <para>Display Name: Name</para>
     /// </summary>
@@ -197,6 +219,17 @@ public partial class TestEntity : ExtendedEntity
         set => SetAttributeValue("ratio", value);
     }
 
+    /// <summary>
+    /// <para>Display Name: A ReadOnly Attribute</para>
+    /// </summary>
+    [AttributeLogicalName("readonlyattribute")]
+    [DisplayName("A ReadOnly Attribute")]
+    public ManagedProperty<string> ReadOnlyAttribute
+    {
+        get => GetAttributeValue<ManagedProperty<string>>("readonlyattribute");
+        set => SetAttributeValue("readonlyattribute", value);
+    }
+
     /// <summary>
     /// <para>Display Name: Revenue</para>
     /// </summary>
@@ -231,28 +264,39 @@ public partial class TestEntity : ExtendedEntity
         set => this.SetOptionSetValue("status", value);
     }
 
+    /// <summary>
+    /// <para>Display Name: Unique Identifier</para>
+    /// </summary>
+    [AttributeLogicalName("uniqueid")]
+    [DisplayName("Unique Identifier")]
+    public Guid? UniqueId
+    {
+        get => GetAttributeValue<Guid?>("uniqueid");
+        set => SetAttributeValue("uniqueid", value);
+    }
+
 
     /// <summary>
     /// Gets the logical column name for a property on the TestEntity entity, using the AttributeLogicalNameAttribute if present.
     /// </summary>
-    /// <param name="lambda">Expression to pick the column</param>
+    /// <param name="column">Expression to pick the column</param>
     /// <returns>Name of column</returns>
     /// <exception cref="ArgumentNullException">If no expression is provided</exception>
     /// <exception cref="ArgumentException">If the expression is not x => x.column</exception>
-    public static string GetColumnName(Expression<Func<TestEntity, object>> lambda)
+    public static string GetColumnName(Expression<Func<TestEntity, object>> column)
     {
-        return TableAttributeHelpers.GetColumnName(lambda);
+        return TableAttributeHelpers.GetColumnName(column);
     }
 
     /// <summary>
-    /// Retrieves a TestEntity with the specified attributes.
+    /// Retrieves the TestEntity with the specified columns.
     /// </summary>
     /// <param name="service">Organization service</param>
     /// <param name="id">Id of TestEntity to retrieve</param>
-    /// <param name="attrs">Expressions that specify attributes to retrieve</param>
+    /// <param name="columns">Expressions that specify columns to retrieve</param>
     /// <returns>The retrieved TestEntity</returns>
-    public static TestEntity Retrieve(IOrganizationService service, Guid id, params Expression<Func<TestEntity, object>>[] attrs)
+    public static TestEntity Retrieve(IOrganizationService service, Guid id, params Expression<Func<TestEntity, object>>[] columns)
     {
-        return service.Retrieve(id, attrs);
+        return service.Retrieve(id, columns);
     }
 }
\ No newline at end of file
diff --git a/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.cs b/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.cs
index be625db..e90d2b4 100644
--- a/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.cs
+++ b/tests/DataverseProxyGenerator.Tests/AttributeTypeCodeGenTests.cs
@@ -15,6 +15,9 @@ public async Task Generates_Correct_Code_For_All_AttributeTypes()
             DisplayName = "Test Entity",
             Columns = new List<ColumnModel>
             {
+                new ManagedColumnModel("string", IsNullable: false) { LogicalName = "readonlyattribute", SchemaName = "ReadOnlyAttribute", DisplayName = "A ReadOnly Attribute" },
+                new BooleanManagedColumnModel { LogicalName = "managedbooleanattribute", SchemaName = "ManagedBooleanAttribute", DisplayName = "A Managed Boolean Attribute" },
+                new ManagedColumnModel("DateTime", IsNullable: true) { LogicalName = "manageddatetimeattribute", SchemaName = "ManagedDateTimeAttribute", DisplayName = "A Managed DateTime Attribute" },
                 new StringColumnModel { LogicalName = "obsoleteattribute", SchemaName = "ObsoleteAttribute", DisplayName = "An Obsolete Attribute", IsObsolete = true },
                 new StringColumnModel { LogicalName = "name", SchemaName = "Name", DisplayName = "Name" },
                 new StringColumnModel { LogicalName = "prefix_pascalcasetest_withname", SchemaName = "prefix_pascalCaseTest_withName", DisplayName = "Pascal Test" },
@@ -49,6 +52,7 @@ public async Task Generates_Correct_Code_For_All_AttributeTypes()
                     RelationshipName = "contact_account",
                 },
                 new PartyListColumnModel { LogicalName = "participants", SchemaName = "Participants", DisplayName = "Participants" },
+                new UniqueIdentifierColumnModel { LogicalName = "uniqueid", SchemaName = "UniqueId", DisplayName = "Unique Identifier" },
             },
         };
 
diff --git a/tests/DataverseProxyGenerator.Tests/RetrieveMethodTests.cs b/tests/DataverseProxyGenerator.Tests/RetrieveMethodTests.cs
index 62e3052..ebc96a9 100644
--- a/tests/DataverseProxyGenerator.Tests/RetrieveMethodTests.cs
+++ b/tests/DataverseProxyGenerator.Tests/RetrieveMethodTests.cs
@@ -43,8 +43,8 @@ public void EntityClass_ShouldGenerateStaticRetrieveMethod()
         // Assert
         file.Should().NotBeNull();
         file!.Content.Should().Contain("using System.Linq.Expressions;");
-        file.Content.Should().Contain("public static Account Retrieve(IOrganizationService service, Guid id, params Expression<Func<Account, object>>[] attrs)");
-        file.Content.Should().Contain("return service.Retrieve(id, attrs);");
+        file.Content.Should().Contain("public static Account Retrieve(IOrganizationService service, Guid id, params Expression<Func<Account, object>>[] columns)");
+        file.Content.Should().Contain("return service.Retrieve(id, columns);");
     }
 
     [Fact]
@@ -88,12 +88,12 @@ public void EntityClass_ShouldGenerateStaticGetColumnNameMethod()
         file.Content.Should().Contain("/// <summary>");
         file.Content.Should().Contain("/// Gets the logical column name for a property on the Account entity, using the AttributeLogicalNameAttribute if present.");
         file.Content.Should().Contain("/// </summary>");
-        file.Content.Should().Contain("/// <param name=\"lambda\">Expression to pick the column</param>");
+        file.Content.Should().Contain("/// <param name=\"columns\">Expressions that specify columns to retrieve</param>");
         file.Content.Should().Contain("/// <returns>Name of column</returns>");
         file.Content.Should().Contain("/// <exception cref=\"ArgumentNullException\">If no expression is provided</exception>");
         file.Content.Should().Contain("/// <exception cref=\"ArgumentException\">If the expression is not x => x.column</exception>");
-        file.Content.Should().Contain("public static string GetColumnName(Expression<Func<Account, object>> lambda)");
-        file.Content.Should().Contain("return TableAttributeHelpers.GetColumnName(lambda);");
+        file.Content.Should().Contain("public static string GetColumnName(Expression<Func<Account, object>> column)");
+        file.Content.Should().Contain("return TableAttributeHelpers.GetColumnName(column);");
     }
 
     [Fact]
@@ -136,7 +136,7 @@ public void TableAttributeHelpers_ShouldGenerateRetrieveExtensionMethod()
         file!.Content.Should().Contain("using Microsoft.Xrm.Sdk.Query;");
         file.Content.Should().Contain("public static T Retrieve<T>(this IOrganizationService service, Guid id, params Expression<Func<T, object>>[] attrs)");
         file.Content.Should().Contain("where T : Entity, new()");
-        file.Content.Should().Contain("var columnNames = attrs.Select(attr => entity.GetColumnName(attr)).ToArray();");
+        file.Content.Should().Contain("var columnNames = attrs.Select(attr => GetColumnName(attr)).ToArray();");
         file.Content.Should().Contain("return service.Retrieve(entityLogicalName, id, columnSet).ToEntity<T>();");
     }
 }
\ No newline at end of file