Exchange Server 2019 Email Issue

I'm facing a critical issue with our newly installed Exchange Server 2019. Emails are getting stuck in the drafts folder across all users' mailboxes. I would also need outbound emails configured and working.

Key Details:
- Issue is pervasive: All users are affected
- Server: Exchange Server 2019
- Recent Changes: This is a new installation

Ideal candidates for this project should have:
- Extensive experience with Exchange Server 2019
- Proven track record in troubleshooting email issues
- Skills in diagnosing problems in a new server setup

Prompt resolution of this issue is critical to our operations.