Zoom Phone External Contacts - Show Internal Users First?

I recently created a program to sync contacts from our CRM system into Zoom Phone as External Contacts. This works great, but it has the problem of making it difficult to search for internal extensions in the directory. 

It's not so much a problem on the Zoom Workplace app, but it is an issue on our desk phones (Yealink). For example, if I search the directory for 'Jason', it shows the max results of 200, which doesn't include the internal extension for Jason. Searching the full name doesn't return a result, when it did before syncing the external contacts. 

Is there any way to prioritise internal contacts in the search so they are returned before external contacts? If there is a way to amend the LDAP search filter to only show internal users, that would be a suitable solution too.