Categories management

I have a contact list imported from outlook which had values in the categories filed. These do not show up in emclient so how do I reassign categories to 500 plus contacts. I can only find instructions on how to do it one by one

You can export the contacts from MS Outlook as a csv file, then when you import that into eM Client you can map that column to tag.

Or, export each category separately then import each group into a separate folder in eM Client until you can tag them.