diff --git a/docs/resources/vserver_server.md b/docs/resources/vserver_server.md
index c9e53a3..a41f074 100644
--- a/docs/resources/vserver_server.md
+++ b/docs/resources/vserver_server.md
@@ -44,7 +44,6 @@ The following arguments are supported:
 - **action** (String, Optional) Action with server. It can be `stop`, `start` and `reboot`.
 - **attach_floating** (Boolean, Optional) Is Server attach a floating IP.
 - **expire_password** (Boolean, Optional) Skip change password: false, else: true
-- **is_poc** (Boolean, Optional) POC wallet.
 - **os_licence** (Boolean, Optional) Licence of OS.
 - **root_disk_encryption_type** (String, Optional) Type encryption of boot volume.
 - **security_group** (List of String, Optional) ID of the SecGroups.
@@ -81,8 +80,6 @@ In addition to all arguments above, the following attributes are exported:
   -  **subnet_uuid** (String)
   -  **type** (String)
 - **os_info** (String) Info OS.
-- **owner_email** (String) Email owner of Server.
-- **share** (Boolean) Is Server Shared?
 - **ssh_key_name** (String) Name of SSH Key.
 
 
diff --git a/docs/resources/vserver_volume.md b/docs/resources/vserver_volume.md
index e71b190..429f5d2 100644
--- a/docs/resources/vserver_volume.md
+++ b/docs/resources/vserver_volume.md
@@ -30,15 +30,12 @@ The following arguments are supported:
 - **size** (Number, Required) Size of Volume.
 - **volume_type_id** (String, Required) ID of Volume's Type
 - **encryption_type** (String, Optional) Type encryption of volume.
-- **is_poc** (Boolean, Optional) POC wallet.
 
 ## Attributes Reference
 
 In addition to all arguments above, the following attributes are exported:
 
 - **id** (String) The ID of this Volume.
-- **owner_email** (String) Email owner of this Volume.
-- **share** (Boolean) Is volume shared?
-- **bootable** (Boolean, Required) Bootbale of Volume
+- **bootable** (Boolean, Required) Bootable of Volume
 
 
diff --git a/resource/vserver/resource_server.go b/resource/vserver/resource_server.go
index e887d55..b94e271 100644
--- a/resource/vserver/resource_server.go
+++ b/resource/vserver/resource_server.go
@@ -94,7 +94,7 @@ func ResourceServer() *schema.Resource {
 				Elem: &schema.Schema{
 					Type: schema.TypeString,
 				},
-				Optional: true,
+				Required: true,
 			},
 			"source_type": {
 				Type:     schema.TypeString,
@@ -191,11 +191,6 @@ func resourceServerStateRefreshFunc(cli *client.Client, serverID string, project
 }
 func resourceServerCreate(d *schema.ResourceData, m interface{}) error {
 	projectID := d.Get("project_id").(string)
-	securityGroupInterface := d.Get("security_group").([]interface{})
-	var securityGroup []string
-	for _, s := range securityGroupInterface {
-		securityGroup = append(securityGroup, s.(string))
-	}
 	if _, ok := d.GetOk("root_disk_size"); !ok {
 		return fmt.Errorf(`The argument "root_disk_size" is required, but no definition was found.`)
 	}
@@ -208,6 +203,14 @@ func resourceServerCreate(d *schema.ResourceData, m interface{}) error {
 			return fmt.Errorf(`The argument "user data" is set, the argument "user data base64 encode" is required, but no definition was found.`)
 		}
 	}
+	securityGroupInterface := d.Get("security_group").([]interface{})
+	var securityGroup []string
+	for _, s := range securityGroupInterface {
+		securityGroup = append(securityGroup, s.(string))
+	}
+	if len(securityGroup) == 0 {
+		return fmt.Errorf(`The argument "security_group" must not be empty.`)
+	}
 	server := vserver.CreateServerRequest{
 		AttachFloating:         d.Get("attach_floating").(bool),
 		EncryptionVolume:       d.Get("encryption_volume").(bool),
@@ -317,6 +320,11 @@ func resourceServerRead(d *schema.ResourceData, m interface{}) error {
 		externalInterfaces = append(externalInterfaces, externalInterfaceMap)
 	}
 	d.Set("external_interfaces", externalInterfaces)
+	var securityGroups []string
+	for _, secGroup := range server.SecGroups {
+		securityGroups = append(securityGroups, secGroup.Uuid)
+	}
+	d.Set("security_group", securityGroups)
 	return nil
 }
 
@@ -504,6 +512,9 @@ func resourceServerUpdateSecgroup(d *schema.ResourceData, m interface{}) error {
 	for _, s := range securityGroupInterface {
 		securityGroup = append(securityGroup, s.(string))
 	}
+	if len(securityGroup) == 0 {
+		return fmt.Errorf(`The argument "security_group" must not be empty.`)
+	}
 	serverChangeSecGroup := vserver.ChangeSecGroupRequest{
 		ServerId:      d.Id(),
 		SecurityGroup: securityGroup,
diff --git a/resource/vserver/resource_volume.go b/resource/vserver/resource_volume.go
index aeea816..68d80ef 100644
--- a/resource/vserver/resource_volume.go
+++ b/resource/vserver/resource_volume.go
@@ -62,6 +62,11 @@ func ResourceVolume() *schema.Resource {
 				Type:     schema.TypeBool,
 				Computed: true,
 			},
+			"multi_attach": {
+				Type:     schema.TypeBool,
+				Optional: true,
+				ForceNew: true,
+			},
 		},
 	}
 }
@@ -86,6 +91,7 @@ func resourceVolumeCreate(d *schema.ResourceData, m interface{}) error {
 		Name:           d.Get("name").(string),
 		Size:           int32(d.Get("size").(int)),
 		VolumeTypeId:   d.Get("volume_type_id").(string),
+		MultiAttach:    d.Get("multi_attach").(bool),
 	}
 	cli := m.(*client.Client)
 	resp, httpResponse, err := cli.VserverClient.VolumeRestControllerApi.CreateVolumeUsingPOST1(context.TODO(), a, projectID)
diff --git a/resource/vserver/util.go b/resource/vserver/util.go
index 6768536..d721036 100644
--- a/resource/vserver/util.go
+++ b/resource/vserver/util.go
@@ -15,5 +15,9 @@ func CheckErrorResponse(httpResponse *http.Response) bool {
 
 func GetResponseBody(httpResponse *http.Response) string {
 	localVarBody, _ := io.ReadAll(httpResponse.Body)
-	return fmt.Sprint("Status Code: ", httpResponse.StatusCode, " , ", string(localVarBody))
+	responseMessage := string(localVarBody)
+	if httpResponse.StatusCode == 403 {
+		responseMessage = "You don't have permission to do this action"
+	}
+	return fmt.Sprint("Status Code: ", httpResponse.StatusCode, ", ", responseMessage)
 }