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Have you validated your connectors in EXO yet? &nbsp;If not and they fail, that could be a reason why, and the error message could be insightful to troubleshooting.
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Have you validated your connectors in EXO yet?  If not and they fail, that could be a reason why, and the error message could be insightful to troubleshooting.

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Hi,<br />
<br />
I enabled authentication and it worked. Thanks, much
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Hi,

I enabled authentication and it worked. Thanks, much

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Hi All,<br />
<br />
We have a hybrid setup with exchange 2016 and Exchange 2013 as we migrate. Were having an issue with relay from our internal scanners. They are able to send email internally but not externally. We have dns pointing to the 2016 server and we see the IP's in both Relay connectors on 2013 and 2016 email servers. However it wont send external from scanners, the error is invalid recipient on the scanner. However if we change the scanner to point to the 2013 server it works. &nbsp;Anyone come across this situation or have any thoughts. Thanks Much
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Hi All,

We have a hybrid setup with exchange 2016 and Exchange 2013 as we migrate. Were having an issue with relay from our internal scanners. They are able to send email internally but not externally. We have dns pointing to the 2016 server and we see the IP's in both Relay connectors on 2013 and 2016 email servers. However it wont send external from scanners, the error is invalid recipient on the scanner. However if we change the scanner to point to the 2013 server it works.  Anyone come across this situation or have any thoughts. Thanks Much

hybrid 2016 exchange with 2013 exchange - Relay Issue

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

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

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.