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I have one user that when i send her a appointment i get a undeliverable saying that it did not reach all of its recipients. &nbsp;The user that it says can not be reached is a former employee that has been gone for some time. &nbsp;The user has been deleted out of our system as well as her mailbox purged. &nbsp;We have checked the properties and security on the users computer that is getting this message and there is no one other than the normal admins with access. &nbsp;We have checked mailbox rights as well as delegates and she is not listed under there either. &nbsp;To make the problem even worse when the user sends herself a appointment she does not get a undeliverable. &nbsp;She only gets a undeliverable when anyone else sends her a appointment. &nbsp;It does not happen on any other type of outlook item other than calender. &nbsp;How do i make this stop sending back undeliverables??
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I have one user that when i send her a appointment i get a undeliverable saying that it did not reach all of its recipients.  The user that it says can not be reached is a former employee that has been gone for some time.  The user has been deleted out of our system as well as her mailbox purged.  We have checked the properties and security on the users computer that is getting this message and there is no one other than the normal admins with access.  We have checked mailbox rights as well as delegates and she is not listed under there either.  To make the problem even worse when the user sends herself a appointment she does not get a undeliverable.  She only gets a undeliverable when anyone else sends her a appointment.  It does not happen on any other type of outlook item other than calender.  How do i make this stop sending back undeliverables??

Undeliverable Appointment

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.