How to change external user to managed user

Hi Safriyal, 

Welcome to Box Community and glad to help! 

• Here's how you could change a external user to a managed user: 

1. Go to Admin Console > Users & Groups.
2. Click the External Users tab.
3. Double-click an external user name.
4. Click Make Managed User to convert the external user to a managed user. (This option will not be available for external users who are currently part of another Business or Enterprise account.)

• Make sure that you're inviting a collaborator with existing Box account.  Otherwise, if you send an invitation to collaborate in a folder and they don’t yet have a Box account, an account will be provisioned and that user will automatically become a managed user under your enterprise instance (https://support.box.com/hc/en-us/articles/360043693694-Collaboration-Invites-Create-An-Account). 

To know more about managing your external users, please visit this helpful article. 

Hope it helps! 

I have attempted to add an employee that somehow is listed as an external user to a managed user.  Sent invite and her accepted but is still showing as an external user.