Sync contacts between different account types

I have two account types on my phone: Exchange and Google. I'd like to sync the two, to make sure that an account that exists only in Google exists in Exchange as well, and vice-versa. I'd also like to sync the photos (in my case, the Exchange photos are all very old and low quality, and I'd like to fix that). I couldn't find a way to do this using the standard Contacts app on my phone (Galaxy S8). I'm guessing I'd need to use some kind of app for this, but most searches yield backup-restore applications which seem to be designed to, well, backup to a file / restore from a file (which isn't what I need), and completely ignore the photo problem. Any suggestions?