Forum Discussion
<Tenant>.onmicrosoft.com added to on-premises Accepted Domains
Not many of my clients are using Exchange Hybrid, but there is one at the moment. We're looking to move them into 365 completely, but covid put a spanner in the works so that's been delayed.
The server is Exchange 2010 server, and I can see both the tenant.onmicrosoft.com and tenant.mail.onmicrosoft.com set up as both a accepted and a remote domain
Accepted domains
And for remote domains...
Going to be honest with you - I can't recall if I added in the tenant.onmicrosoft.com one manually or not as it was last year. That said, I wouldn't have added it in unless I had a good reason to do so.
Hope this helps in some way,
Mark
HidMov Thanks very much for the info.
Hi, I can also confirm that in older hybrid deployments using Exchange 2010 I have seen both the .onmicrosoft.com and mail.onmicrosoft.com domains added as accepted domains on premises.
On more recent hybrids using Exchange 2016, only the mail.onmicrosoft.com domain is present.
- Thanks for the info as well. Based on this, and the earlier response, as well as the environment I noticed it in, seems like it was the way previously, either with Exchange 2010, or just earlier HCW versions.
In retrospect, it seems I've been on quite a stretch of Exchange 2013 and newer projects, which I guess is a good thing, but clearly I've lost touch with 2010, at least a little bit.
