diff --git a/internal/pkg/core/applicant/acme-dns-01/lego-providers/azure-dns/azure-dns.go b/internal/pkg/core/applicant/acme-dns-01/lego-providers/azure-dns/azure-dns.go
index bf36f3fb..21958e00 100644
--- a/internal/pkg/core/applicant/acme-dns-01/lego-providers/azure-dns/azure-dns.go
+++ b/internal/pkg/core/applicant/acme-dns-01/lego-providers/azure-dns/azure-dns.go
@@ -1,13 +1,12 @@
 package azuredns
 
 import (
-	"fmt"
-	"strings"
 	"time"
 
-	"github.com/Azure/azure-sdk-for-go/sdk/azcore/cloud"
 	"github.com/go-acme/lego/v4/challenge"
 	"github.com/go-acme/lego/v4/providers/dns/azuredns"
+
+	azcommon "github.com/usual2970/certimate/internal/pkg/vendors/azure-sdk/common"
 )
 
 type ChallengeProviderConfig struct {
@@ -29,16 +28,11 @@ func NewChallengeProvider(config *ChallengeProviderConfig) (challenge.Provider,
 	providerConfig.ClientID = config.ClientId
 	providerConfig.ClientSecret = config.ClientSecret
 	if config.CloudName != "" {
-		switch strings.ToLower(config.CloudName) {
-		case "default", "public", "cloud", "azurecloud":
-			providerConfig.Environment = cloud.AzurePublic
-		case "usgovernment", "azureusgovernment":
-			providerConfig.Environment = cloud.AzureGovernment
-		case "china", "chinacloud", "azurechina", "azurechinacloud":
-			providerConfig.Environment = cloud.AzureChina
-		default:
-			return nil, fmt.Errorf("azuredns: unknown environment %s", config.CloudName)
+		env, err := azcommon.GetEnvironmentConfiguration(config.CloudName)
+		if err != nil {
+			return nil, err
 		}
+		providerConfig.Environment = env
 	}
 	if config.DnsPropagationTimeout != 0 {
 		providerConfig.PropagationTimeout = time.Duration(config.DnsPropagationTimeout) * time.Second
diff --git a/internal/pkg/vendors/azure-sdk/common/config.go b/internal/pkg/vendors/azure-sdk/common/config.go
new file mode 100644
index 00000000..844c49bb
--- /dev/null
+++ b/internal/pkg/vendors/azure-sdk/common/config.go
@@ -0,0 +1,47 @@
+package common
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore/cloud"
+)
+
+func IsEnvironmentPublic(env string) bool {
+	switch strings.ToLower(env) {
+	case "", "default", "public", "azurecloud":
+		return true
+	default:
+		return false
+	}
+}
+
+func IsEnvironmentGovernment(env string) bool {
+	switch strings.ToLower(env) {
+	case "usgovernment", "government", "azureusgovernment", "azuregovernment":
+		return true
+	default:
+		return false
+	}
+}
+
+func IsEnvironmentChina(env string) bool {
+	switch strings.ToLower(env) {
+	case "china", "chinacloud", "azurechina", "azurechinacloud":
+		return true
+	default:
+		return false
+	}
+}
+
+func GetEnvironmentConfiguration(env string) (cloud.Configuration, error) {
+	if IsEnvironmentPublic(env) {
+		return cloud.AzurePublic, nil
+	} else if IsEnvironmentGovernment(env) {
+		return cloud.AzureGovernment, nil
+	} else if IsEnvironmentChina(env) {
+		return cloud.AzureChina, nil
+	}
+
+	return cloud.Configuration{}, fmt.Errorf("unknown azure cloud environment %s", env)
+}