Regarding Azure Cosmos DB BulkExecutor library for Java

I want to perform bulk update on cosmos db using cosmos db java sdk. While reading the docs, I came across the Azure Cosmos DB Bulk Executor library - https://github.com/Azure/azure-cosmosdb-bulkexecutor-java-getting-started

But the sdk it uses -
\com.microsoft.azure\<\/groupId\>
\azure-documentdb\<\/artifactId\>

While, I find all the latest cosmos sdk under -
\com.azure\<\/groupId\>
\azure-cosmos\<\/artifactId\>

Could you please help me with these queries:
1) If the **com.microsoft.azure** sdk is still valid for use and is recommended?
2) Is there a similar approach of performing bulk execution using sdk under "com.azure" group id
3) What would be the suggested approach for updating ( ~200k records) using azure java sdk ?

TIA!