Jun 27 2019 07:43 AM
We have Exchange Hybrid setup. In exchange admin center we would like to understand the different between creating “User mailbox” vs “Office 365 mailbox”.
The problem is when we create a new in active directory and it gets sync. The mail box is creatd with MailboxType = User and RecipientType = UserMailbox. However when we create it from EAC console as Office 365 mailbox the Mailbox Type is set to Office 365 and RecipientType to MailUser. We would like to understand what different it would make and if there is a possibility of creating Office 365 mailbox from AD Sync.
Jun 27 2019 08:14 AM
Jun 27 2019 09:52 AM
In other words it creates a "remote mailbox" directly in Exchange Online.
Jun 27 2019 12:38 PM
like they mentioned, the mailuser object is created so that on-prem knows to put that object in the GAL for on-prem users and knows that it can accept mail for that address and forward it along to EOP to deliver it to O365.