diff --git a/docs/reference/schemas/config/functions/copy.md b/docs/reference/schemas/config/functions/copy.md
new file mode 100644
index 000000000..206d8ab2d
--- /dev/null
+++ b/docs/reference/schemas/config/functions/copy.md
@@ -0,0 +1,220 @@
+---
+description: Reference for the 'copy' DSC configuration document resource loop
+ms.date:     02/28/2025
+ms.topic:    reference
+title:       copy
+---
+
+# copy
+
+## Synopsis
+
+Defines a loop to create multiple instances of a resource.
+
+## Syntax
+
+```Syntax
+copy:
+  name: <loopName>
+  count: <numberOfIterations>
+```
+
+## Description
+
+The `copy` property enables you to create multiple instances of a resource in a
+DSC configuration. This is the equivalent implementation of the copy
+functionality from Azure Resource Manager (ARM) templates, but without support
+for variables and properties, which will be added in future releases.
+
+When you use `copy` on a resource, DSC creates multiple instances of that
+resource based on the specified count. You can use the [`copyIndex()`][01]
+function within the resource definition to access the current iteration index
+and create unique names or property values for each instance.
+
+> [!NOTE]
+> The `mode` and `batchSize` properties are not currently supported and will
+> result in an error if used.
+
+## Examples
+
+### Example 1 - Create multiple Echo resources
+
+This example demonstrates the basic usage of `copy` to create three instances
+of a Debug Echo resource.
+
+```yaml
+# copy.example.1.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Echo-{0}', copyIndex())]"
+  copy:
+    name: echoLoop
+    count: 3
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Hello DSC"
+```
+
+```bash
+dsc config get --file copy.example.1.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Echo-0
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Hello DSC
+- name: Echo-1
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Hello DSC
+- name: Echo-2
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Hello DSC
+messages: []
+hadErrors: false
+```
+
+### Example 2 - Using copyIndex with offset
+
+This example demonstrates using [`copyIndex()`][01] with an offset to start
+numbering from a different value.
+
+```yaml
+# copy.example.2.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Service-{0}', copyIndex(100))]"
+  copy:
+    name: serviceLoop
+    count: 3
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Service instance"
+```
+
+```bash
+dsc config get --file copy.example.2.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Service-100
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Service instance
+- name: Service-101
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Service instance
+- name: Service-102
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: Service instance
+messages: []
+hadErrors: false
+```
+
+### Example 3 - Using named loop references
+
+This example shows how to reference a specific loop by name when using
+[`copyIndex()`][01].
+
+```yaml
+# copy.example.3.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Resource-{0}', copyIndex('mainLoop'))]"
+  copy:
+    name: mainLoop
+    count: 2
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "From main loop"
+```
+
+```bash
+dsc config get --file copy.example.3.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Resource-0
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: From main loop
+- name: Resource-1
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: From main loop
+messages: []
+hadErrors: false
+```
+
+## Properties
+
+### name
+
+The name of the copy loop. This name can be used with the [`copyIndex()`][01]
+function to reference the current iteration index of this specific loop.
+
+```yaml
+Type:     string
+Required: true
+```
+
+### count
+
+The number of iterations to perform. Must be a non-negative integer. If set to
+0, no instances of the resource are created.
+
+```yaml
+Type:     integer
+Required: true
+Minimum:  0
+```
+
+### mode
+
+> [!WARNING]
+> The `mode` property is not currently supported and will result in an error
+> if used.
+
+This property is reserved for future implementation to specify whether resources
+should be created serially or in parallel.
+
+### batchSize
+
+> [!WARNING]
+> The `batchSize` property is not currently supported and will result in an
+> error if used.
+
+This property is reserved for future implementation to specify how many
+resources to create in each batch when using parallel mode.
+
+## Limitations
+
+The current implementation has the following limitations:
+
+- **Variables and properties**: Copy loops for variables and properties are not
+  yet supported.
+- **Mode control**: The `mode` property (serial/parallel) is not implemented.
+- **Batch processing**: The `batchSize` property is not implemented.
+- **Name expressions**: The resource name expression must evaluate to a string.
+
+## Related Functions
+
+- [`copyIndex()`][01] - Returns the current iteration index of a copy loop.
+
+<!-- Link reference definitions -->
+[01]: ./copyIndex.md
diff --git a/docs/reference/schemas/config/functions/copyIndex.md b/docs/reference/schemas/config/functions/copyIndex.md
new file mode 100644
index 000000000..56a61ddf4
--- /dev/null
+++ b/docs/reference/schemas/config/functions/copyIndex.md
@@ -0,0 +1,218 @@
+---
+description: Reference for the 'copyIndex' DSC configuration document function
+ms.date:     02/28/2025
+ms.topic:    reference
+title:       copyIndex
+---
+
+# copyIndex
+
+## Synopsis
+
+Returns the current iteration index of a copy loop.
+
+## Syntax
+
+```Syntax
+copyIndex()
+copyIndex(<offset>)
+copyIndex('<loopName>')
+copyIndex('<loopName>', <offset>)
+```
+
+## Description
+
+The `copyIndex()` function returns the current iteration index of a copy loop.
+This function can only be used within resources that have a `copy` property
+defined. The function is necessary for creating unique names and property
+values for each instance created by the copy loop.
+
+The index starts at 0 for the first iteration and increments by 1 for each
+subsequent iteration. You can add an offset to shift the starting number, or
+reference a specific loop by name when multiple copy loops are present.
+
+## Examples
+
+### Example 1 - Basic copyIndex usage
+
+This example shows the basic usage of `copyIndex()` to create unique resource
+names.
+
+```yaml
+# copyIndex.example.1.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Resource-{0}', copyIndex())]"
+  copy:
+    name: basicLoop
+    count: 3
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Hello DSC"
+```
+```bash
+dsc config get --file copyIndex.example.1.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Resource-0
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Hello World"
+- name: Resource-1
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Hello World"
+- name: Resource-2
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Hello World"
+messages: []
+hadErrors: false
+```
+### Example 2 - Using copyIndex with offset
+This example demonstrates using an offset to start numbering from a different
+value.
+```yaml
+# copyIndex.example.2.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Server-{0}', copyIndex(10))]"
+  copy:
+    name: serverLoop
+    count: 3
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Server instance starting from 10 till 12"
+```
+```bash
+dsc config get --file copyIndex.example.2.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Server-10
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Server instance starting from 10 till 12"
+- name: Server-11
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Server instance starting from 10 till 12"
+- name: Server-12
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Server instance starting from 10 till 12"
+messages: []
+hadErrors: false
+```
+### Example 3 - Using copyIndex with loop name
+This example shows how to reference a specific loop by name.
+```yaml
+# copyIndex.example.3.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Item-{0}', copyIndex('itemLoop'))]"
+  copy:
+    name: itemLoop
+    count: 1
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Item from loop"
+```
+```bash
+dsc config get --file copyIndex.example.3.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Item-0
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Item from loop"
+messages: []
+hadErrors: false
+```
+### Example 4 - Using copyIndex with loop name and offset
+This example combines both loop name and offset parameters.
+```yaml
+# copyIndex.example.4.dsc.config.yaml
+$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+resources:
+- name: "[format('Database-{0}', copyIndex('dbLoop', 100))]"
+  copy:
+    name: dbLoop
+    count: 2
+  type: Microsoft.DSC.Debug/Echo
+  properties:
+    output: "Database instance"
+```
+```bash
+dsc config get --file copyIndex.example.4.dsc.config.yaml
+```
+
+```yaml
+results:
+- name: Database-100
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Database instance"
+- name: Database-101
+  type: Microsoft.DSC.Debug/Echo
+  result:
+    actualState:
+      output: "Database instance"
+messages: []
+hadErrors: false
+```
+## Parameters
+### offset
+An optional integer offset to add to the current index. The offset must be a
+non-negative number.
+```yaml
+Type:     integer
+Required: false
+Minimum:  0
+```
+### loopName
+An optional string specifying the name of the copy loop to reference. This is
+useful when you have multiple copy loops and need to reference a specific one.
+```yaml
+Type:     string
+Required: false
+```
+## Output
+The `copyIndex()` function returns an integer representing the current iteration
+index, optionally adjusted by the offset.
+
+```yaml
+Type: integer
+```
+
+## Error Conditions
+
+The `copyIndex()` function will return an error in the following situations:
+
+- **Used outside copy loop**: The function can only be used within resources
+  that have a `copy` property defined.
+- **Negative offset**: The offset parameter must be non-negative.
+- **Invalid loop name**: If a loop name is specified but no loop with that
+  name exists.
+- **Invalid arguments**: If the arguments provided are not of the expected
+  types.
+
+## Related Properties
+
+- [`copy`][01] - Defines a loop to create multiple instances of a resource.
+
+<!-- Link reference definitions -->
+[01]: ./copy.md
\ No newline at end of file
diff --git a/docs/reference/schemas/config/functions/overview.md b/docs/reference/schemas/config/functions/overview.md
index dd8341359..236b8a6db 100644
--- a/docs/reference/schemas/config/functions/overview.md
+++ b/docs/reference/schemas/config/functions/overview.md
@@ -603,6 +603,7 @@ The following list of functions operate on integer values or arrays of integer v
 
 The following list of functions operate on resource instances:
 
+- [copyIndex()][copyIndex] - Return the current iteration index of a copy loop.
 - [reference()][reference] - Return the result data for another resource instance.
 - [resourceId()][resourceId] - Return the ID of another resource instance to reference or depend
   on.
@@ -631,6 +632,7 @@ The following list of functions create or convert values of a given type:
 [add]:         ./add.md
 [base64]:      ./base64.md
 [concat]:      ./concat.md
+[copyIndex]:   ./copyIndex.md
 [createArray]: ./createArray.md
 [div]:         ./div.md
 [envvar]:      ./envvar.md