diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/README.md b/clients/google-api-services-workstations/v1beta/2.0.0/README.md
index badffc0f342..c29300e2e01 100644
--- a/clients/google-api-services-workstations/v1beta/2.0.0/README.md
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-workstations</artifactId>
-      <version>v1beta-rev20230802-2.0.0</version>
+      <version>v1beta-rev20230904-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-workstations:v1beta-rev20230802-2.0.0'
+  implementation 'com.google.apis:google-api-services-workstations:v1beta-rev20230904-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/EphemeralDirectory.java b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/EphemeralDirectory.java
new file mode 100644
index 00000000000..b5e77533cc1
--- /dev/null
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/EphemeralDirectory.java
@@ -0,0 +1,92 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+/*
+ * This code was generated by https://github.com/googleapis/google-api-java-client-services/
+ * Modify at your own risk.
+ */
+
+package com.google.api.services.workstations.v1beta.model;
+
+/**
+ * An ephemeral directory which won't persist across workstation sessions. It is freshly created on
+ * every workstation start operation.
+ *
+ * <p> This is the Java data model class that specifies how to parse/serialize into the JSON that is
+ * transmitted over HTTP when working with the Cloud Workstations API. For a detailed explanation
+ * see:
+ * <a href="https://developers.google.com/api-client-library/java/google-http-java-client/json">https://developers.google.com/api-client-library/java/google-http-java-client/json</a>
+ * </p>
+ *
+ * @author Google, Inc.
+ */
+@SuppressWarnings("javadoc")
+public final class EphemeralDirectory extends com.google.api.client.json.GenericJson {
+
+  /**
+   * An EphemeralDirectory backed by a Compute Engine persistent disk.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private GcePersistentDisk gcePd;
+
+  /**
+   * Required. Location of this directory in the running workstation.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String mountPath;
+
+  /**
+   * An EphemeralDirectory backed by a Compute Engine persistent disk.
+   * @return value or {@code null} for none
+   */
+  public GcePersistentDisk getGcePd() {
+    return gcePd;
+  }
+
+  /**
+   * An EphemeralDirectory backed by a Compute Engine persistent disk.
+   * @param gcePd gcePd or {@code null} for none
+   */
+  public EphemeralDirectory setGcePd(GcePersistentDisk gcePd) {
+    this.gcePd = gcePd;
+    return this;
+  }
+
+  /**
+   * Required. Location of this directory in the running workstation.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getMountPath() {
+    return mountPath;
+  }
+
+  /**
+   * Required. Location of this directory in the running workstation.
+   * @param mountPath mountPath or {@code null} for none
+   */
+  public EphemeralDirectory setMountPath(java.lang.String mountPath) {
+    this.mountPath = mountPath;
+    return this;
+  }
+
+  @Override
+  public EphemeralDirectory set(String fieldName, Object value) {
+    return (EphemeralDirectory) super.set(fieldName, value);
+  }
+
+  @Override
+  public EphemeralDirectory clone() {
+    return (EphemeralDirectory) super.clone();
+  }
+
+}
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GceInstance.java b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GceInstance.java
index 90dea36ebe4..5eee2c36bda 100644
--- a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GceInstance.java
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GceInstance.java
@@ -135,6 +135,15 @@ public final class GceInstance extends com.google.api.client.json.GenericJson {
   @com.google.api.client.util.Key
   private java.lang.String serviceAccount;
 
+  /**
+   * Optional. Scopes to grant to the service_account. Various scopes are automatically added based
+   * on feature usage. When specified, users of workstations under this configuration must have
+   * `iam.serviceAccounts.actAs` on the service account.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.util.List<java.lang.String> serviceAccountScopes;
+
   /**
    * Optional. A set of Compute Engine Shielded instance options.
    * The value may be {@code null}.
@@ -377,6 +386,27 @@ public GceInstance setServiceAccount(java.lang.String serviceAccount) {
     return this;
   }
 
+  /**
+   * Optional. Scopes to grant to the service_account. Various scopes are automatically added based
+   * on feature usage. When specified, users of workstations under this configuration must have
+   * `iam.serviceAccounts.actAs` on the service account.
+   * @return value or {@code null} for none
+   */
+  public java.util.List<java.lang.String> getServiceAccountScopes() {
+    return serviceAccountScopes;
+  }
+
+  /**
+   * Optional. Scopes to grant to the service_account. Various scopes are automatically added based
+   * on feature usage. When specified, users of workstations under this configuration must have
+   * `iam.serviceAccounts.actAs` on the service account.
+   * @param serviceAccountScopes serviceAccountScopes or {@code null} for none
+   */
+  public GceInstance setServiceAccountScopes(java.util.List<java.lang.String> serviceAccountScopes) {
+    this.serviceAccountScopes = serviceAccountScopes;
+    return this;
+  }
+
   /**
    * Optional. A set of Compute Engine Shielded instance options.
    * @return value or {@code null} for none
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GcePersistentDisk.java b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GcePersistentDisk.java
new file mode 100644
index 00000000000..ef1814c837e
--- /dev/null
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/GcePersistentDisk.java
@@ -0,0 +1,154 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+/*
+ * This code was generated by https://github.com/googleapis/google-api-java-client-services/
+ * Modify at your own risk.
+ */
+
+package com.google.api.services.workstations.v1beta.model;
+
+/**
+ * An EphemeralDirectory is backed by a Compute Engine persistent disk.
+ *
+ * <p> This is the Java data model class that specifies how to parse/serialize into the JSON that is
+ * transmitted over HTTP when working with the Cloud Workstations API. For a detailed explanation
+ * see:
+ * <a href="https://developers.google.com/api-client-library/java/google-http-java-client/json">https://developers.google.com/api-client-library/java/google-http-java-client/json</a>
+ * </p>
+ *
+ * @author Google, Inc.
+ */
+@SuppressWarnings("javadoc")
+public final class GcePersistentDisk extends com.google.api.client.json.GenericJson {
+
+  /**
+   * Optional. Type of the disk to use. Defaults to `"pd-standard"`.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String diskType;
+
+  /**
+   * Optional. Whether the disk is read only. If true, the disk may be shared by multiple VMs and
+   * source_snapshot must be set.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.Boolean readOnly;
+
+  /**
+   * Optional. Name of the disk image to use as the source for the disk. Must be empty if
+   * source_snapshot is set. Updating source_image will update content in the ephemeral directory
+   * after the workstation is restarted. This field is mutable.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String sourceImage;
+
+  /**
+   * Optional. Name of the snapshot to use as the source for the disk. Must be empty if source_image
+   * is set. Updating source_snapshot will update content in the ephemeral directory after the
+   * workstation is restarted. This field is mutable.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.lang.String sourceSnapshot;
+
+  /**
+   * Optional. Type of the disk to use. Defaults to `"pd-standard"`.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getDiskType() {
+    return diskType;
+  }
+
+  /**
+   * Optional. Type of the disk to use. Defaults to `"pd-standard"`.
+   * @param diskType diskType or {@code null} for none
+   */
+  public GcePersistentDisk setDiskType(java.lang.String diskType) {
+    this.diskType = diskType;
+    return this;
+  }
+
+  /**
+   * Optional. Whether the disk is read only. If true, the disk may be shared by multiple VMs and
+   * source_snapshot must be set.
+   * @return value or {@code null} for none
+   */
+  public java.lang.Boolean getReadOnly() {
+    return readOnly;
+  }
+
+  /**
+   * Optional. Whether the disk is read only. If true, the disk may be shared by multiple VMs and
+   * source_snapshot must be set.
+   * @param readOnly readOnly or {@code null} for none
+   */
+  public GcePersistentDisk setReadOnly(java.lang.Boolean readOnly) {
+    this.readOnly = readOnly;
+    return this;
+  }
+
+  /**
+   * Optional. Name of the disk image to use as the source for the disk. Must be empty if
+   * source_snapshot is set. Updating source_image will update content in the ephemeral directory
+   * after the workstation is restarted. This field is mutable.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getSourceImage() {
+    return sourceImage;
+  }
+
+  /**
+   * Optional. Name of the disk image to use as the source for the disk. Must be empty if
+   * source_snapshot is set. Updating source_image will update content in the ephemeral directory
+   * after the workstation is restarted. This field is mutable.
+   * @param sourceImage sourceImage or {@code null} for none
+   */
+  public GcePersistentDisk setSourceImage(java.lang.String sourceImage) {
+    this.sourceImage = sourceImage;
+    return this;
+  }
+
+  /**
+   * Optional. Name of the snapshot to use as the source for the disk. Must be empty if source_image
+   * is set. Updating source_snapshot will update content in the ephemeral directory after the
+   * workstation is restarted. This field is mutable.
+   * @return value or {@code null} for none
+   */
+  public java.lang.String getSourceSnapshot() {
+    return sourceSnapshot;
+  }
+
+  /**
+   * Optional. Name of the snapshot to use as the source for the disk. Must be empty if source_image
+   * is set. Updating source_snapshot will update content in the ephemeral directory after the
+   * workstation is restarted. This field is mutable.
+   * @param sourceSnapshot sourceSnapshot or {@code null} for none
+   */
+  public GcePersistentDisk setSourceSnapshot(java.lang.String sourceSnapshot) {
+    this.sourceSnapshot = sourceSnapshot;
+    return this;
+  }
+
+  @Override
+  public GcePersistentDisk set(String fieldName, Object value) {
+    return (GcePersistentDisk) super.set(fieldName, value);
+  }
+
+  @Override
+  public GcePersistentDisk clone() {
+    return (GcePersistentDisk) super.clone();
+  }
+
+}
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/Workstation.java b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/Workstation.java
index e5c644bda39..66c04810f94 100644
--- a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/Workstation.java
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/Workstation.java
@@ -106,6 +106,14 @@ public final class Workstation extends com.google.api.client.json.GenericJson {
   @com.google.api.client.util.Key
   private java.lang.Boolean reconciling;
 
+  /**
+   * Output only. Time when this workstation was most recently successfully started, regardless of
+   * the workstation's initial state.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private String startTime;
+
   /**
    * Output only. Current state of the workstation.
    * The value may be {@code null}.
@@ -309,6 +317,25 @@ public Workstation setReconciling(java.lang.Boolean reconciling) {
     return this;
   }
 
+  /**
+   * Output only. Time when this workstation was most recently successfully started, regardless of
+   * the workstation's initial state.
+   * @return value or {@code null} for none
+   */
+  public String getStartTime() {
+    return startTime;
+  }
+
+  /**
+   * Output only. Time when this workstation was most recently successfully started, regardless of
+   * the workstation's initial state.
+   * @param startTime startTime or {@code null} for none
+   */
+  public Workstation setStartTime(String startTime) {
+    this.startTime = startTime;
+    return this;
+  }
+
   /**
    * Output only. Current state of the workstation.
    * @return value or {@code null} for none
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/WorkstationConfig.java b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/WorkstationConfig.java
index 043d43eec4e..05f02265833 100644
--- a/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/WorkstationConfig.java
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/com/google/api/services/workstations/v1beta/model/WorkstationConfig.java
@@ -118,6 +118,19 @@ public final class WorkstationConfig extends com.google.api.client.json.GenericJ
   @com.google.api.client.util.Key
   private CustomerEncryptionKey encryptionKey;
 
+  /**
+   * Optional. Ephemeral directories which won't persist across workstation sessions.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.util.List<EphemeralDirectory> ephemeralDirectories;
+
+  static {
+    // hack to force ProGuard to consider EphemeralDirectory used, since otherwise it would be stripped out
+    // see https://github.com/google/google-api-java-client/issues/543
+    com.google.api.client.util.Data.nullOf(EphemeralDirectory.class);
+  }
+
   /**
    * Optional. Checksum computed by the server. May be sent on update and delete requests to make
    * sure that the client has an up-to-date value before proceeding.
@@ -197,6 +210,16 @@ public final class WorkstationConfig extends com.google.api.client.json.GenericJ
   @com.google.api.client.util.Key
   private java.lang.Boolean reconciling;
 
+  /**
+   * Optional. Immutable. Specifies the zones used to replicate the VM and disk resources within the
+   * region. If set, exactly two zones within the workstation cluster's region must be specified—for
+   * example, `['us-central1-a', 'us-central1-f']`. If this field is empty, two default zones within
+   * the region are used. Immutable after the workstation configuration is created.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.util.List<java.lang.String> replicaZones;
+
   /**
    * Optional. Number of seconds that a workstation can run until it is automatically shut down. We
    * recommend that workstations be shut down daily to reduce costs and so that security updates can
@@ -409,6 +432,23 @@ public WorkstationConfig setEncryptionKey(CustomerEncryptionKey encryptionKey) {
     return this;
   }
 
+  /**
+   * Optional. Ephemeral directories which won't persist across workstation sessions.
+   * @return value or {@code null} for none
+   */
+  public java.util.List<EphemeralDirectory> getEphemeralDirectories() {
+    return ephemeralDirectories;
+  }
+
+  /**
+   * Optional. Ephemeral directories which won't persist across workstation sessions.
+   * @param ephemeralDirectories ephemeralDirectories or {@code null} for none
+   */
+  public WorkstationConfig setEphemeralDirectories(java.util.List<EphemeralDirectory> ephemeralDirectories) {
+    this.ephemeralDirectories = ephemeralDirectories;
+    return this;
+  }
+
   /**
    * Optional. Checksum computed by the server. May be sent on update and delete requests to make
    * sure that the client has an up-to-date value before proceeding.
@@ -567,6 +607,29 @@ public WorkstationConfig setReconciling(java.lang.Boolean reconciling) {
     return this;
   }
 
+  /**
+   * Optional. Immutable. Specifies the zones used to replicate the VM and disk resources within the
+   * region. If set, exactly two zones within the workstation cluster's region must be specified—for
+   * example, `['us-central1-a', 'us-central1-f']`. If this field is empty, two default zones within
+   * the region are used. Immutable after the workstation configuration is created.
+   * @return value or {@code null} for none
+   */
+  public java.util.List<java.lang.String> getReplicaZones() {
+    return replicaZones;
+  }
+
+  /**
+   * Optional. Immutable. Specifies the zones used to replicate the VM and disk resources within the
+   * region. If set, exactly two zones within the workstation cluster's region must be specified—for
+   * example, `['us-central1-a', 'us-central1-f']`. If this field is empty, two default zones within
+   * the region are used. Immutable after the workstation configuration is created.
+   * @param replicaZones replicaZones or {@code null} for none
+   */
+  public WorkstationConfig setReplicaZones(java.util.List<java.lang.String> replicaZones) {
+    this.replicaZones = replicaZones;
+    return this;
+  }
+
   /**
    * Optional. Number of seconds that a workstation can run until it is automatically shut down. We
    * recommend that workstations be shut down daily to reduce costs and so that security updates can
diff --git a/clients/google-api-services-workstations/v1beta/2.0.0/pom.xml b/clients/google-api-services-workstations/v1beta/2.0.0/pom.xml
index eae1222745a..ed304879b40 100644
--- a/clients/google-api-services-workstations/v1beta/2.0.0/pom.xml
+++ b/clients/google-api-services-workstations/v1beta/2.0.0/pom.xml
@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-workstations</artifactId>
-  <version>v1beta-rev20230802-2.0.0</version>
-  <name>Cloud Workstations API v1beta-rev20230802-2.0.0</name>
+  <version>v1beta-rev20230904-2.0.0</version>
+  <name>Cloud Workstations API v1beta-rev20230904-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>