In/with regard to somebody/something
Definition 1 of 2
Pro Tip 1/3Medium Formality
It's less formal than 'regarding' but more formal than 'about'; suitable for professional and academic contexts. 
Please see the detailed report in regard to the project's progress.
Pro Tip 2/3Connecting Ideas
Use it to connect what you’re talking about to your main topic, linking ideas smoothly. 
In regard to your question, I will need more time to provide a thorough answer.
Pro Tip 3/3Transitions in Speech
It's often used to smoothly transition to a new point in presentations or discussions. 
With regard to our sales targets, we need to increase our efforts.