'Autodiscover service couldn't be located' when trying to access Exchange 2010 account with EWS MANAGED API

Question

I am using Auto discover service Url for a specified e-mail address.

ExchangeService Service = new ExchangeService(ExchangeVersion.Exchange2010);
Service.Cr         


        

Answer 1

For the record of completeness:

We encountered a service suddenly stopping with this particular error. As the service had been running unattended for months, using EWS to monitor a mailbox, it turned out that the password was expired. This caused the AutoDiscovery to fail with the very same exception:

The Autodiscover service couldn't be located

Updating the Exchange user's password in the AD and checking its Password Never Expires property solved the problem for us.