Forum Discussion
<Tenant>.onmicrosoft.com added to on-premises Accepted Domains
Hello all, I'm working with a customer who has had their Hybrid Configuration in place for years and they do not remember is this happened automatically via the HCW, or if they manually added it....
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.
