diff --git a/generated/google/apis/iam_v1.rb b/generated/google/apis/iam_v1.rb
index e6bb27dba..2fd0400b2 100644
--- a/generated/google/apis/iam_v1.rb
+++ b/generated/google/apis/iam_v1.rb
@@ -27,7 +27,7 @@ module Google
     # @see https://cloud.google.com/iam/
     module IamV1
       VERSION = 'V1'
-      REVISION = '20201022'
+      REVISION = '20201029'
 
       # View and manage your data across Google Cloud Platform services
       AUTH_CLOUD_PLATFORM = 'https://www.googleapis.com/auth/cloud-platform'
diff --git a/generated/google/apis/iam_v1/classes.rb b/generated/google/apis/iam_v1/classes.rb
index 9edf8c1fd..bc59e5457 100644
--- a/generated/google/apis/iam_v1/classes.rb
+++ b/generated/google/apis/iam_v1/classes.rb
@@ -159,12 +159,6 @@ module Google
       class Binding
         include Google::Apis::Core::Hashable
       
-        # A client-specified ID for this binding. Expected to be globally unique to
-        # support the internal bindings-by-ID API.
-        # Corresponds to the JSON property `bindingId`
-        # @return [String]
-        attr_accessor :binding_id
-      
         # Represents a textual expression in the Common Expression Language (CEL) syntax.
         # CEL is a C-like expression language. The syntax and semantics of CEL are
         # documented at https://github.com/google/cel-spec. Example (Comparison): title:
@@ -226,7 +220,6 @@ module Google
       
         # Update properties of this object
         def update!(**args)
-          @binding_id = args[:binding_id] if args.key?(:binding_id)
           @condition = args[:condition] if args.key?(:condition)
           @members = args[:members] if args.key?(:members)
           @role = args[:role] if args.key?(:role)
@@ -1230,10 +1223,14 @@ module Google
       # these key-pairs, and Google retains ONLY the public key. System-managed keys
       # are automatically rotated by Google, and are used for signing for a maximum of
       # two weeks. The rotation process is probabilistic, and usage of the new key
-      # will gradually ramp up and down over the key's lifetime. We recommend caching
-      # the public key set for a service account for no more than 24 hours to ensure
-      # you have access to the latest keys. Public keys for all service accounts are
-      # also published at the OAuth2 Service Account API.
+      # will gradually ramp up and down over the key's lifetime. If you cache the
+      # public key set for a service account, we recommend that you update the cache
+      # every 15 minutes. User-managed keys can be added and removed at any time, so
+      # it is important to update the cache frequently. For Google-managed keys,
+      # Google will publish a key at least 6 hours before it is first used for signing
+      # and will keep publishing it for at least 6 hours after it was last used for
+      # signing. Public keys for all service accounts are also published at the OAuth2
+      # Service Account API.
       class ServiceAccountKey
         include Google::Apis::Core::Hashable
       
diff --git a/generated/google/apis/iam_v1/representations.rb b/generated/google/apis/iam_v1/representations.rb
index fd29c3efd..e870eb06a 100644
--- a/generated/google/apis/iam_v1/representations.rb
+++ b/generated/google/apis/iam_v1/representations.rb
@@ -335,7 +335,6 @@ module Google
       class Binding
         # @private
         class Representation < Google::Apis::Core::JsonRepresentation
-          property :binding_id, as: 'bindingId'
           property :condition, as: 'condition', class: Google::Apis::IamV1::Expr, decorator: Google::Apis::IamV1::Expr::Representation
       
           collection :members, as: 'members'
diff --git a/generated/google/apis/iam_v1/synth.metadata b/generated/google/apis/iam_v1/synth.metadata
index fb5a74b21..11f111610 100644
--- a/generated/google/apis/iam_v1/synth.metadata
+++ b/generated/google/apis/iam_v1/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "9840c481849200572321532ecc3b128bebbc1583"
+        "sha": "64251b516a71bd1bdcc1a7d3ac934182b38a11a7"
       }
     }
   ]