I'm facing an HTTP ERROR 500 when trying to access my Exchange Server 2019 after a fresh installation in my lab. The error message says "exchangeservername.domain.local can't currently handle this request." I have a mailbox linked to my domain account and attempted to recreate the virtual directories, but I'm still getting the error when I try to log in to the Exchange Admin Center (EAC). Any help would be awesome! Apologies for any typos—I'm posting this from my iPhone.
5 Answers
Did you generate a self-signed certificate? I've encountered issues with Outlook Web App (OWA) after fresh installs, although not specifically with EAC.
Have you considered reinstalling the latest cumulative update (CU) for Exchange? That usually resolves issues with the IIS virtual directory and might fix your problem.
I experienced a similar issue after upgrading my standalone 2019 server to the latest CU. I found out that the /ecp/server.config file was empty, which resulted in the 500 error. I managed to restore it from a backup, and everything started working again. It was pretty strange!
Just to double-check, are you using DNS for the .local address instead of mDNS? Also, how did you create a valid certificate for your .local domain?
You might have overlooked a necessary configuration step. Since this is just a lab setup, it could be worth starting over. Are you closely following the installation guide provided by Microsoft? There's a good document on deploying new installations that could help you double-check your steps.

I've already tried reinstalling, but the error persists. I followed the Microsoft guidelines closely.