diff --git a/backend/azure/azure.go b/backend/azure/azure.go
index 562e23a7..1e029d36 100644
--- a/backend/azure/azure.go
+++ b/backend/azure/azure.go
@@ -19,15 +19,14 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/binary"
-	"errors"
 	"fmt"
 	"io"
 	"math"
 	"os"
 	"strconv"
 	"strings"
+	"time"
 
-	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore/streaming"
 	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
 	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
@@ -532,9 +531,10 @@ func (az *Azure) ListParts(ctx context.Context, input *s3.ListPartsInput) (s3res
 			break
 		}
 		parts = append(parts, s3response.Part{
-			Size:       *el.Size,
-			ETag:       *el.Name,
-			PartNumber: partNumber,
+			Size:         *el.Size,
+			ETag:         *el.Name,
+			PartNumber:   partNumber,
+			LastModified: time.Now().Format(backend.RFC3339TimeFormat),
 		})
 	}
 	return s3response.ListPartsResult{
@@ -774,21 +774,6 @@ func getString(str *string) string {
 	return *str
 }
 
-// Parses azure ResponseError into AWS APIError
-func azureErrToS3Err(apiErr error) error {
-	var azErr *azcore.ResponseError
-	if !errors.As(apiErr, &azErr) {
-		return apiErr
-	}
-
-	resp := s3err.APIError{
-		Code:           azErr.ErrorCode,
-		Description:    azErr.RawResponse.Status,
-		HTTPStatusCode: azErr.StatusCode,
-	}
-	return resp
-}
-
 // Converts io.Reader into io.ReadSeekCloser
 func getReadSeekCloser(input io.Reader) (io.ReadSeekCloser, error) {
 	var buffer bytes.Buffer
diff --git a/backend/azure/err.go b/backend/azure/err.go
new file mode 100644
index 00000000..2a33012f
--- /dev/null
+++ b/backend/azure/err.go
@@ -0,0 +1,50 @@
+// Copyright 2023 Versity Software
+// This file is 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.
+
+package azure
+
+import (
+	"errors"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+	"github.com/versity/versitygw/s3err"
+)
+
+// Parses azure ResponseError into AWS APIError
+func azureErrToS3Err(apiErr error) error {
+	var azErr *azcore.ResponseError
+	if !errors.As(apiErr, &azErr) {
+		return apiErr
+	}
+
+	return azErrToS3err(azErr)
+}
+
+func azErrToS3err(azErr *azcore.ResponseError) s3err.APIError {
+	switch azErr.ErrorCode {
+	case "ContainerAlreadyExists":
+		return s3err.GetAPIError(s3err.ErrBucketAlreadyExists)
+	case "InvalidResourceName", "ContainerNotFound":
+		return s3err.GetAPIError(s3err.ErrNoSuchBucket)
+	case "BlobNotFound":
+		return s3err.GetAPIError(s3err.ErrNoSuchKey)
+	case "TagsTooLarge":
+		return s3err.GetAPIError(s3err.ErrInvalidTag)
+	}
+	return s3err.APIError{
+		Code:           azErr.ErrorCode,
+		Description:    azErr.RawResponse.Status,
+		HTTPStatusCode: azErr.StatusCode,
+	}
+}