Forum Discussion
Create shared mailbox on Hybrid environment - directly on O365 or onpremises then migrate it to O365
Hi Carlos,
If you have an Hybrid, your autodiscover is pointing to your on-premises Exchange. If you create your Mailbox only in Cloud, your AD and Exchange does not have any propreties of that mailbox, that is the issue.
Hi Carlos,
If you still have mailboxes on-premises and would like to have access to your shared mailboxes you should create on-premises and then migrate to Office 365.
Hi Nuno,
My mailbox is already migrated to O365 from a while a go, but tonight I tested creating to shared mailboxes. One directly on the cloud and the other on-premises (then migrated), after applying the full access permissions on both for my account only the second one is working (including auto mapping)
I was expecting that for both shared mailboxes to work, but apparently the ones created directly on the cloud have some issues with delegation.
https://support.microsoft.com/en-us/help/3129334/users-in-a-hybrid-deployment-can-t-access-a-shared-mailbox-that-was-created-in-exchange-online
So, I assume that create the shared mailboxes on-premises and then migratem is the best solution even if we have all of our user mailboxes migrated.