The mail app is not creating folders, it says it has done it and then tells me it was unable to perform the action. How can I make folders stay!? 

Hi,

Since the description is quite simple, I still need to know more details:

1. What is the mail app, is it Outlook?

2. If it is Outlook, what type is the account that you have configured in Outlook? POP3, IMAP or Exchange?

3. The exact error message will be helpful to let me know the cause.

Regards,

Melon Chen
TechNet Community Su