All users are connected locally (Outlook 2016 lastest update of Office 365 business premium) to the Exchange 2016. Exchange 2016 has been updated from RTM to CU4.
- we had to rebuild the profile for some users because they were receiving the "temporary mailbox" problem: "your mailbox has been temporarily moved on MS Exchange Server. a temporary mailbox exists..."
- The search result in Outlook is no longer showing the name of the sender for all emails of last week an older but it shows the right result for the most recent emails. We've been trying te re-index in Outlook. All Exchange services in Exchange are running including search. It's only in Outlook, OWA shows the send for all emails in the search result.