Solved

Exchange 2010 -> 2016 Migration:  internal Mailfow

Posted on 2016-11-20
3
37 Views
Last Modified: 2016-11-20
Hi,

I know this has been talked about a million times and more, but I can't find my error in this one:

Exchange 2010 SP3 on Server 2008 (R1) hosting roughly 450 mailboxes alone.  New VM 2012 R2 running Exchange 2016 CU3 just installed into the domain.  All seems well.

I can mail from 2010 to 2016, but not the other way.  The messages stall in the queue on the 2016 box with this message:

[{LRT=20.11.2016 12:50:01},{LED=451 4.4.0 Target host responded with: "451 5.7.3 Cannot achieve Exchange Server authentication." Last endpoint attempted was 192.168.5.104:25};{FWDN=internal.domain.local};{192.168.5.104}]

The IP is the one of the old box.  I checked the receive connectors and disabled Exchange Server authentication on every one.  I also checked the send connectors on the 2016 box and disabled it there.

Where else can I look?
0
Comment
Question by:Ralph Scharping
  • 2
3 Comments
 
LVL 2

Accepted Solution

by:
Pune Tech earned 500 total points
ID: 41894749
Please refer following article to fix this issue

http://www.petenetlive.com/KB/Article/0000791
0
 
LVL 2

Author Closing Comment

by:Ralph Scharping
ID: 41894784
Looks like what I missed was a restart of the transport service...
0
 
LVL 2

Expert Comment

by:Pune Tech
ID: 41894871
Thanks for the update and points.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

We are happy to announce a brand new addition to our line of acclaimed email signature management products – CodeTwo Email Signatures for Office 365.
Scam emails are a huge burden for many businesses. Spotting one is not always easy. Follow our tips to identify if an email you receive is a scam.
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

743 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now