How much privacy would i be sacrificing to have my work email on my personal phone?

I'm non-techy. I work for a public school district and visit with kids in about a dozen schools. I like having my work email on my phone so teachers can get in touch if they need me. For years we've just used the outlook app with no real issues that I've noticed. We're seeing more and more micromanagement and it sucks. We recently got notice that we have to install Cisco Duo on our phones if we want to have our email on it. Should i do that? Or just say no and be ok with being out of contact?