"The SMTP address has no mailbox associated with it" error when you access a user's mailbox by using EWS application

Support

Hello,

Select a different account.

You have multiple accounts

Choose the account you want to sign in with.

Exchange Server 2013 Enterprise Edition Exchange Server 2013 Standard Edition More...Less

Symptoms

This issue occurs when you provide a mail-enabled user with a delegate or service account in a Microsoft Exchange Web Service (EWS)-based application in an Exchange Server 2013 environment. This issue will not occur when you use EWS-based application impersonation.

Resolution

To resolve this issue, install the the following update:

Cumulative Update 8 for Exchange Server 2013

More Information

This issue occurs because, when Exchange Server 2013 processes a FindItem request, Exchange Server 2013 tries to log the request. That causes an attempt to look up mailbox attributes. However, a mail-enabled user does not have the mailbox attributes. Therefore, Exchange Server 2013 throws an "ErrorNonExistentMailbox" error.