Update modify.md with params for #6359

iterative/dvc#6359 adds some additional parameters to the azure config. This PR is the documentation for those.

content/docs/command-reference/remote/modify.md

@@ -406,6 +406,23 @@ application. To use a custom authentication method, use the following parameters
   ```dvc
   $ dvc remote modify myremote allow_anonymous_login true
   ```
+
+* When using `dvc` on windows with authentication through `az cli`
+  some or all of the following exclude params may have to be set, depending on your setup.
+
+  See https://docs.microsoft.com/en-us/python/api/azure-identity/azure.identity.defaultazurecredential?view=azure-python for
+  further details.
+  * `exclude_environment_credential` - exclude an already configured service principal.
+  * `exclude_visual_studio_code_credential` - exclude credentials stored in VS Code.
+  * `exclude_shared_token_cache_credential` - exclude cached shared tokens.
+  * `exclude_managed_identity_credential` - exclude the managed identity from the credential.
+
+    ```dvc
+    $ dvc remote modify --local myremote exclude_environment_credential true
+    $ dvc remote modify --local myremote exclude_visual_studio_code_credential true
+    $ dvc remote modify --local myremote exclude_shared_token_cache_credential true
+    $ dvc remote modify --local myremote exclude_managed_identity_credential true
+    ```
 
 Note that Azure remotes can also authenticate via environment variables (instead
 of `dvc remote modify`). These are tried if none of the params above are set.