@NathanMcNulty Technically the option is there but you have to go through Support to prove the need and get it added. We had a Legacy LOB app that needed a couple of these about 2.5/3 years ago during our initial MDE deployment.
@gwblok@Gibson99dotcom@AdamGrossTX@miketerrill During initial rollout, it was blocked for us due to "no executables from TEMP" AppLocker rule, since hitting the "Try the new outlook" toggle downloaded the bootstrap into TEMP. Ended up whitelisting it eventually.
@SwiftOnSecurity If you're just attending, their web client is now good enough. Haven't felt the need to install the thick client in a couple of years.