Update how-to-use-vm-token.md

Author: barclayn

articles/active-directory/managed-identities-azure-resources/how-to-use-vm-token.md

@@ -359,6 +359,7 @@ The managed identities endpoint signals errors via the status code field of the
 | Status Code | Error Reason | How To Handle |
 | ----------- | ------------ | ------------- |
 | 404 Not found. | IMDS endpoint is updating. | Retry with Exponential Backoff. See guidance below. |
+| 410  | IMDS is going through updates |  IMDS will be available within 70 seconds |
 | 429 Too many requests. |  IMDS Throttle limit reached. | Retry with Exponential Backoff. See guidance below. |
 | 4xx Error in request. | One or more of the request parameters was incorrect. | Don't retry.  Examine the error details for more information.  4xx errors are design-time errors.|
 | 5xx Transient error from service. | The managed identities for Azure resources subsystem or Azure Active Directory returned a transient error. | It's safe to retry after waiting for at least 1 second.  If you retry too quickly or too often, IMDS and/or Azure AD may return a rate limit error (429).|