I have written MS office-handler and Successfully uploaded the jar into felix console and made the jar status as Active but its not working as expected .When i upload a MS document it should call the custom class which is written and should create the thumbnail and rendition .As i am new to AEM DAM implementation please let me know do i need to created any workflow to initiate the class or what should i need to do ?Please reply who has already faced this type of issue.
You will need to update the DAM Update Asset workflow by adding a custom workflow step to specifically render thumbnails for MS office documents. Here  is an example of creating a custom workflow step. In addition, you will need to modify the Thumbnail Process step to exclude the MS Office documents from being processed there.
Can you please provide any example for the above to implement the Workflow model as well as how to modify the Thumbnail Process step to exclude the MS Office documents. If any link is there please share .