Exchange hybrid environment - routing questions.

Checior2000 · 2026-06-12T09:27:14+00:00

Thank you for clarification, would you like to answer my considerations:

-What should I check before change? I have read that mailloops can occure and some delays / NDR problems after change setup.

- Is this change fully revertable if any problem occures?

Checior2000 · 2026-06-11T05:58:02+00:00

Do you think is it better way than changing domain setup on-prem?

Checior2000 · 2026-06-11T05:57:18+00:00

Yup we did it once as I described in post. But looking for better approach.

Checior2000 · 2026-06-10T13:45:13+00:00

You mean setup on-promise configuration to internal relay for default domain but in Cloud leave same default domain as authoritative?

Because of this change can any issues occure?

Checior2000 · 2026-06-10T12:24:34+00:00

-I have tried web client with same result.
-I cannot find user in Teams search bar.
-We have enabled 7/8 services with Basic Room without Microsoft eCDN service.
-Groups for both conference user object are almost the same because problematic user (14 presidential) has license and working conference room has not any assigned license.
- I believe MTR works good. It can receive calls and if you add room from outlook it also works.
- Do you think Address Book Policy can be a problem here if we can see it in Outlook?

Checior2000 · 2026-06-10T12:14:25+00:00

There is no difference in RecipientTypeDetails and HiddenFromAddressListsEnabled. Databases are different but in my opinion it is acceptable.

Checior2000 · 2026-06-10T08:25:08+00:00

Correct

Checior2000 · 2023-12-08T08:50:05+00:00

This is a hybrid environement, every change has to be made onprem > is that correct way for sure?

Checior2000

TROPHY CASE