Hello experts,
we have to change plain text emails into html mails for more than 7.000 users. I think the best way is to mass update all user accounts by using a csv-file. I used the csv-template on "Import Data" and filled in the required data I assumed. As soon as I try to import no data will be changed in the User Account Settings and I get this error message as follows:
I'm not sure if I miss something. On the one hand I assume I need the enterprise user to change user account settings but on the other hand I'm able to change user account setting manually. This confuses me.
In my opinion these 4 entries in the csv-file are mandatory:
I'm pretty sure there is someone who can help me 
Best regards,
Heiko