In order to do product "Description" and "Short Description" edit in MicroBiz and to have them successfully synchronized to your Magento site, go on with the follwoing steps.

Navigate to "Store Operations" > "Catalog" > "Manage Products" tab as shown below.

Open the product you want to edit by clicking on "update" icon or by double clicking on the product.

Navigate to "Web Information" tab where you will see 2 fields "Description" and "Long".

Changes done in "Long" field will update your Magento product "Description *" field.

Changes done in "Description" filed will sync your Magento product "Short Description *" field.

After edit is done click on "Save".

The sync after edit may take few minutes.