Currently, you cannot. The UI in Outlook will let you edit the name but it won't get synced to our servers and the change of an address books/calendars name will be reverted immediately.

But you can change the name via our webapp:

  • Log in on and go to contacts or calendars.
  • Click the cog wheels next to the item you want to rename from the list on the left.
  • Edit the name to your liking and hit save.