anyone knows why the max string length of the Episerver categories is 50 characters, and if it's possible to raise that length?
I would say the reason is because it was not designed to hold URLs from the beginning, just a short identifier to be able to use from code instead of the primary key integer. My only idea to raise it is to edit the nvarchar length in tblCategory in the database, but you also have to create your own copy of the UI and remove the trimming of the length in the backend.
You can also check this out if it's an option for you to replace the built-in category functionality:
That's probably true! Although it wouldn't have costed anything NOT to trim the fields to 50 chars.
Thanks Mattias, I'll check it out.