Tips for Restructuring OneDrive for business account on Office 365

Hi All, 

I have a OneDrive for business for one of the user's account.  

Background: 

1. It's an Office 365 tenant. 
2. Office 365 Tenant exist for the last 5 years. 
3. Only one of the users reported that there is some issue with his One Drive for Business (OD4B)  account.  

Investigation: 

1. Found that there is no space constraint for the user's  OD4B account. 
   
   
   
   
2. The key issue is the List Threshold which is way beyond the 5000 limits. 
   
   
   

Challenge: 

1. How to resolve the 5000 limits for this user? 
2. Any guidance creating index for this document so that the user does not his the list 5000 limits. 
   
   Shall I use this blog post to resolve the issue?  

Please advice.