Hello.
I am having problems with email to one of our sister domains. Both servers are Exchange 2010.
I keep getting the 550 5.1.1 resolver error.
They are contacts in our GAL; we use the interorg repl tool to sync them.
I have added the x500 address. It has worked fine previously.
However this time I'm not getting anywhere.
It's not cached in my Outlook; I've checked ADSI Edit; and the same x500 address there is already on the contact.
I telnetted from my CAS server to their outside mx IP. and the email is queued for delivery.
A few seconds later, I get the exact same bounce.
Any ideas what to do next are greatly appreciated.
Thanks!