Hello,
I'm new to Upwork, but not new to managing Exchange servers. I've been doing that for 15+ years. I've managed environment with 5 - 10 mailboxes all the way up to 75,000 mailboxes. I've setup Azure AD Connect / managed AAD in multiple instances for Office 365 migrations.
You can view my professional experience on LinkedIn - [login to view URL]
I also run an IT consulting business - [login to view URL]
Since I'm just getting started with this site, I'd be happy do to this project for you at a discounted rate to build up my feedback and work history on Upwork.
I'd be happy to discuss my experience and expertise further with you. Good luck with your project.