We have a KB on the subject:

How to configure a non-default SQL Server port for the U-Series Appliance

https://beyondtrustcorp.service-now.com/csm?id=kb_article_view&sysparm_article=KB0017201

Be sure to test this in a non-production environment first. 

​Hi @Manasvi 

Great, question!

Yes, you’re able to change the default SQL port to a customized port in the BeyondInsight configuration tool, here is a Tech Doc on how - Configure advanced SQL & event collector settings for PMR in BI integrations

Hope this helps!
Courtney Gage
Customer Success Specialist