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Just another Exchange guys' site
Outbound mail queued up at Edge Server with 451 4.4.0 DNS query failed
I have came across a couple cases with this issue as of recent and thought enough to create a blog...
Date: 04/05/2018
Exchange 2016 users unable to edit Distribution Group membership using Outlook
I've come across a few of these cases recently and felt obligated to put up a post about this issue....
Date: 01/26/2018
Hello world!
Welcome to Developer Network. This is your first post. Edit or delete it, then start blogging!
Date: 01/17/2018