Currently the library supports: cells containing inline or shared strings; numeric values; date and time; formulas multiple worksheets merged cells split panes, a.k.a. frozen rows and columns styling ...

If you want to resize or adjust Column Width in Outlook manually by yourself, you will have to disable automatic sizing as explained in this post.

Currently we have no way to track how many downloads are there for particular plugin from marketplace. Expected behaviour: Download column should increase on every plugin install.