in my application, i try to login account with Azure China 21Vianet.
First, i login success with MSAL,
then i try to load data from server with
```
https://microsoftgraph.chinacloudapi.cn/v1.0/me/mailFolders/microsoft.graph.delta
```
later,i get 400:Bad Request error, and the message
```
{
"error": {
"code": "ErrorInvalidIdMalformed",
"message": "Id is malformed.",
"innerError": {
"date": "2020-10-28T11:18:25",
"request-id": "9a6b40af-c64d-4409-b680-6beb6a85d41d",
"client-request-id": "a9e73033-5341-46f0-a9ce-4fbdc1a8fd3e"
}
}
}
```
Doesn't the AzureChina server support the mailFolders Delta?
Or has another way to make it work?


