EDIT 9/19/2023: This blog post has received significant update.
In this second part of the Demystifying Hybrid Free/Busy, we will cover troubleshooting of Hybrid Free/Busy scenarios, more specifica...
Updated Sep 19, 2023
Version 16.0
Blog Post
Hello Mirela, amazing article.
We have a story where 2 onprem exchange Organizations (org1 and orerg2) share an smtp address space (@company.com). 1 org is already hybrid with O365. All works there, including mail routing via EOP and transport rules to decide left or right.
Now the second org wants their mailboxes also moved to Exchange Online. Both Orgs have company.com as primary SMTP for all users. We will be able to setup a second hybrid (minimal hybrid with manual corrections) to support migration and some level of co-existence. We expect F/B onprem (org2 user) to cloud will work. However Cloud to Org2 user onpremise is likely to fail. What would be required, if at all possible, to make this scenario work ?
Thanks a lot,
Toni