Using New Outlook on Windows for personal email, calendar, and contact management
I am having the same issue. The memory usage ticks up about 10MB + per second until it reaches about 7GB of RAM usage and then freezes (I have 128 GB of RAM). The process is also using 25% of my CPU (Intel i9 w/ 8 cores) at all times.
I have tried rebooting the computer twice, but the app continues to take up system memory and CPU when sitting idle. I have had to switch to Outlook web for now.
I am a US user in Texas.