diff --git a/CHANGELOG.md b/CHANGELOG.md
index 733f443c..f6e2e8e4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 * Fix the potential NPE issue of `DurableTaskClient#terminate` method ([#104](https://github.com/microsoft/durabletask-java/issues/104))
 * Add waitForCompletionOrCreateCheckStatusResponse client API ([#115](https://github.com/microsoft/durabletask-java/pull/115))
 * Support long timers by breaking up into smaller timers ([#114](https://github.com/microsoft/durabletask-java/issues/114))
+* Support restartInstance and pass restartPostUri in HttpManagementPayload ([#108](https://github.com/microsoft/durabletask-java/issues/108))
 
 ## v1.0.0
 
diff --git a/azurefunctions/src/main/java/com/microsoft/durabletask/azurefunctions/HttpManagementPayload.java b/azurefunctions/src/main/java/com/microsoft/durabletask/azurefunctions/HttpManagementPayload.java
index bfd15cf0..4cb45bc8 100644
--- a/azurefunctions/src/main/java/com/microsoft/durabletask/azurefunctions/HttpManagementPayload.java
+++ b/azurefunctions/src/main/java/com/microsoft/durabletask/azurefunctions/HttpManagementPayload.java
@@ -12,6 +12,7 @@
 public class HttpManagementPayload {
     private final String id;
     private final String purgeHistoryDeleteUri;
+    private final String restartPostUri;
     private final String sendEventPostUri;
     private final String statusQueryGetUri;
     private final String terminatePostUri;
@@ -29,6 +30,7 @@ public HttpManagementPayload(
             String requiredQueryStringParameters) {
         this.id = instanceId;
         this.purgeHistoryDeleteUri = instanceStatusURL + "?" + requiredQueryStringParameters;
+        this.restartPostUri = instanceStatusURL + "/restart?" + requiredQueryStringParameters;
         this.sendEventPostUri = instanceStatusURL + "/raiseEvent/{eventName}?" + requiredQueryStringParameters;
         this.statusQueryGetUri = instanceStatusURL + "?" + requiredQueryStringParameters;
         this.terminatePostUri = instanceStatusURL + "/terminate?reason={text}&" + requiredQueryStringParameters;
@@ -78,4 +80,14 @@ public String getTerminatePostUri() {
     public String getPurgeHistoryDeleteUri() {
         return this.purgeHistoryDeleteUri;
     }
+
+    /**
+     * Gets the HTTP POST instance restart endpoint.
+     *
+     * @return The HTTP URL for posting instance restart commands.
+     */
+    public String getRestartPostUri() {
+        return restartPostUri;
+    }
+
 }
diff --git a/client/src/main/java/com/microsoft/durabletask/DurableTaskClient.java b/client/src/main/java/com/microsoft/durabletask/DurableTaskClient.java
index c914c229..14a8135e 100644
--- a/client/src/main/java/com/microsoft/durabletask/DurableTaskClient.java
+++ b/client/src/main/java/com/microsoft/durabletask/DurableTaskClient.java
@@ -282,6 +282,16 @@ public abstract OrchestrationMetadata waitForInstanceCompletion(
      */
     public abstract PurgeResult purgeInstances(PurgeInstanceCriteria purgeInstanceCriteria) throws TimeoutException;
 
+    /**
+     * Restarts an existing orchestration instance with the original input.
+     * @param instanceId the ID of the previously run orchestration instance to restart.
+     * @param restartWithNewInstanceId <code>true</code> to restart the orchestration instance with a new instance ID
+     *                                 <code>false</code> to restart the orchestration instance with same instance ID
+     * @return the ID of the scheduled orchestration instance, which is either <code>instanceId</code> or randomly
+     *         generated depending on the value of <code>restartWithNewInstanceId</code>
+     */
+    public abstract String restartInstance(String instanceId, boolean restartWithNewInstanceId);
+
 //    /**
 //     * Suspends a running orchestration instance.
 //     * @param instanceId the ID of the orchestration instance to suspend
diff --git a/client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClient.java b/client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClient.java
index 56d10804..35798989 100644
--- a/client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClient.java
+++ b/client/src/main/java/com/microsoft/durabletask/DurableTaskGrpcClient.java
@@ -303,6 +303,24 @@ public PurgeResult purgeInstances(PurgeInstanceCriteria purgeInstanceCriteria) t
 //        this.sidecarClient.resumeInstance(resumeRequestBuilder.build());
 //    }
 
+    @Override
+    public String restartInstance(String instanceId, boolean restartWithNewInstanceId) {
+        OrchestrationMetadata metadata = this.getInstanceMetadata(instanceId, true);
+        if (!metadata.isInstanceFound()) {
+            throw new IllegalArgumentException(new StringBuilder()
+                    .append("An orchestration with instanceId ")
+                    .append(instanceId)
+                    .append(" was not found.").toString());
+        }
+
+        if (restartWithNewInstanceId) {
+            return this.scheduleNewOrchestrationInstance(metadata.getName(), this.dataConverter.deserialize(metadata.getSerializedInput(), Object.class));
+        }
+        else {
+            return this.scheduleNewOrchestrationInstance(metadata.getName(), this.dataConverter.deserialize(metadata.getSerializedInput(), Object.class), metadata.getInstanceId());
+        }
+    }
+
     private PurgeResult toPurgeResult(PurgeInstancesResponse response){
         return new PurgeResult(response.getDeletedInstanceCount());
     }
diff --git a/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java b/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
index 5d6a47f5..6edef35e 100644
--- a/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
+++ b/client/src/test/java/com/microsoft/durabletask/IntegrationTests.java
@@ -408,6 +408,55 @@ void termination() throws TimeoutException {
         }
     }
 
+    @ParameterizedTest
+    @ValueSource(booleans = {true, false})
+    void restartOrchestrationWithNewInstanceId(boolean restartWithNewInstanceId) throws TimeoutException {
+        final String orchestratorName = "restart";
+        final Duration delay = Duration.ofSeconds(3);
+
+        DurableTaskGrpcWorker worker = this.createWorkerBuilder()
+                .addOrchestrator(orchestratorName, ctx -> ctx.createTimer(delay).await())
+                .buildAndStart();
+
+        DurableTaskClient client = new DurableTaskGrpcClientBuilder().build();
+        try (worker; client) {
+            String instanceId = client.scheduleNewOrchestrationInstance(orchestratorName, "RestartTest");
+            client.waitForInstanceCompletion(instanceId, defaultTimeout, true);
+            String newInstanceId = client.restartInstance(instanceId, restartWithNewInstanceId);
+            OrchestrationMetadata instance = client.waitForInstanceCompletion(newInstanceId, defaultTimeout, true);
+
+            if (restartWithNewInstanceId) {
+                assertNotEquals(instanceId, newInstanceId);
+            } else {
+                assertEquals(instanceId, newInstanceId);
+            }
+            assertEquals(OrchestrationRuntimeStatus.COMPLETED, instance.getRuntimeStatus());
+            assertEquals("\"RestartTest\"", instance.getSerializedInput());
+        }
+    }
+
+    @Test
+    void restartOrchestrationThrowsException() {
+        final String orchestratorName = "restart";
+        final Duration delay = Duration.ofSeconds(3);
+        final String nonExistentId = "123";
+
+        DurableTaskGrpcWorker worker = this.createWorkerBuilder()
+                .addOrchestrator(orchestratorName, ctx -> ctx.createTimer(delay).await())
+                .buildAndStart();
+
+        DurableTaskClient client = new DurableTaskGrpcClientBuilder().build();
+        try (worker; client) {
+            client.scheduleNewOrchestrationInstance(orchestratorName, "RestartTest");
+
+            assertThrows(
+                IllegalArgumentException.class,
+                () -> client.restartInstance(nonExistentId, true)
+            );
+        }
+
+    }
+
 //    @Test
 //    void suspendResumeOrchestration() throws TimeoutException, InterruptedException {
 //        final String orchestratorName = "suspend";
diff --git a/samples-azure-functions/src/test/java/com/functions/EndToEndTests.java b/samples-azure-functions/src/test/java/com/functions/EndToEndTests.java
index a174b39b..fa5f64df 100644
--- a/samples-azure-functions/src/test/java/com/functions/EndToEndTests.java
+++ b/samples-azure-functions/src/test/java/com/functions/EndToEndTests.java
@@ -5,6 +5,8 @@
 import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
 
 import static io.restassured.RestAssured.get;
 import static io.restassured.RestAssured.post;
@@ -26,14 +28,7 @@ public void basicChain() throws InterruptedException {
         Response response = post(startOrchestrationPath);
         JsonPath jsonPath = response.jsonPath();
         String statusQueryGetUri = jsonPath.get("statusQueryGetUri");
-        String runTimeStatus = null;
-        for (int i = 0; i < 15; i++) {
-            Response statusResponse = get(statusQueryGetUri);
-            runTimeStatus = statusResponse.jsonPath().get("runtimeStatus");
-            if (!"Completed".equals(runTimeStatus)) {
-                Thread.sleep(1000);
-            } else break;
-        }
+        String runTimeStatus = waitForCompletion(statusQueryGetUri);
         assertEquals("Completed", runTimeStatus);
     }
 
@@ -59,4 +54,44 @@ public void continueAsNew() throws InterruptedException {
         runTimeStatus = statusResponse.jsonPath().get("runtimeStatus");
         assertEquals("Terminated", runTimeStatus);
     }
+
+    @ParameterizedTest
+    @ValueSource(booleans = {true, false})
+    public void restart(boolean restartWithNewInstanceId) throws InterruptedException {
+        String startOrchestrationPath = "/api/StartOrchestration";
+        Response response = post(startOrchestrationPath);
+        JsonPath jsonPath = response.jsonPath();
+        String statusQueryGetUri = jsonPath.get("statusQueryGetUri");
+        String runTimeStatus = waitForCompletion(statusQueryGetUri);
+        assertEquals("Completed", runTimeStatus);
+        Response statusResponse = get(statusQueryGetUri);
+        String instanceId = statusResponse.jsonPath().get("instanceId");
+
+        String restartPostUri = jsonPath.get("restartPostUri") + "&restartWithNewInstanceId=" + restartWithNewInstanceId;
+        Response restartResponse = post(restartPostUri);
+        JsonPath restartJsonPath = restartResponse.jsonPath();
+        String restartStatusQueryGetUri = restartJsonPath.get("statusQueryGetUri");
+        String restartRuntimeStatus = waitForCompletion(restartStatusQueryGetUri);
+        assertEquals("Completed", restartRuntimeStatus);
+        Response restartStatusResponse = get(restartStatusQueryGetUri);
+        String newInstanceId = restartStatusResponse.jsonPath().get("instanceId");
+        if (restartWithNewInstanceId) {
+            assertNotEquals(instanceId, newInstanceId);
+        } else {
+            assertEquals(instanceId, newInstanceId);
+        }
+    }
+
+    private String waitForCompletion(String statusQueryGetUri) throws InterruptedException {
+        String runTimeStatus = null;
+        for (int i = 0; i < 15; i++) {
+            Response statusResponse = get(statusQueryGetUri);
+            runTimeStatus = statusResponse.jsonPath().get("runtimeStatus");
+            if (!"Completed".equals(runTimeStatus)) {
+                Thread.sleep(1000);
+            } else break;
+        }
+        return runTimeStatus;
+    }
+
 }