Yes, once the user has accepted the eKey, you can change the eKey type from within the Kevo app.
To change a user's eKey type:
1. Navigate to the "My Locks & eKeys" screen within the Kevo app.
2. Select your lock.
3. Tap the eKeys icon on the bottom of the screen (second tab from left).
3. Select the user you wish to edit.
4. Tap "Edit eKey."
5. Select either "Admin" or "Anytime."
6. Tap "Save changes."