There are a lot of Exchange errors
out there. Way too many, right?

You as a sysadmin know that for sure – Exchange server http 500 error, Exchange error 550, and other common Exchange
error codes. Your Exchange setup sometimes drives you crazy.

Here's a list of the most common errors around VMware and the proven solution to them:

Exchange server http 500 error
Exchange error 550
Other common Exchange error codes

And you'll find the solution to get rid of ALL Exchange errors – forever: Test PRTG and get started within minutes!

1. Exchange server http 500 error:

Quick fix

The error happens whenever you try to login to your Exchange Admin Centre (EAC). This is caused by an improper configuration of the device. The error notification tells you that the device tried to connect with the server, but failed with an error message by the Exchange server itself.

Best solution:

https://exchange-server-guide.blogspot.com/2018/10/exchange-server-http-500-error.html

Proper fix

By using PRTG's Exchange monitoring, you can ensure the smooth delivery of emails. It also checks the Exchange server's availability and performance.

The PRTG's Exchange server monitoring is comprehensive, quick, and easy to install.

Learn more about Exchange monitoring

2. Exchange error 550:

Quick fix

Usually, this error message is an indication for a security setting in your organization or the recipient's organization preventing your email from reaching the recipient. Examples are:

You don't have a permission to send to the recipient.
The recipient is a group, and you are not permitted to send to the group or one of its subgroups.
You don't have a permission to send a message through an email server that is between you and the recipient.
Your email was routed to the wrong email server.

Best solution:

https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/non-delivery-reports-in-exchange-online/fix-error-code-550-5-7-1-in-exchange-online