Forum Discussion
Calendar button missing - On Prem 2016 Exchange
I had exactly the same issue as you and have solved it by following OAUTH manual setup to the letter via this doc https://docs.microsoft.com/en-us/exchange/configure-oauth-authentication-between-exchange-and-exchange-online-organizations-exchange-2013-help?redirectedfrom=MSDN
Get-IntraOrganizationConnector |fl Name,TargetAddressDomains,DiscoveryEndpoint,Enabled
brought no errors but no data. I had previously ran HCW and this completed with no errors (I assumed the hybrid process was fully complete). Exchange 2016 on premises, premium office 365 with licenses applied for exchange online plan. No mailboxes have been migrated, all are on premises. On premises existing Mail contacts and groups WERE visible in exchange online admin. AD Azure connect was already run with optional hybrid exchange enabled. Calendar button did not appear in teams. Teams worked otherwise.
So I ran the manual configuration of OAUTH from that link and calendar button started to appear after 30 mins. Again, these are ALL on premises mailboxes, we have not migrated any mailboxes yet.
One caveat, at the end of the process you need to create an AD object - this object had already been created so it looked like HCW had at least tried to make the OAUTH link but hadnt fully completed it.
To me it looks like this should be working based on what MS says online, but its not. Maybe it's possible to start connecting the exchange and O365 without moving all the mailboxes into O365?
We haven't done anything with the "Hybrid" setting in our ECP.
- https://docs.microsoft.com/en-us/microsoftteams/exchange-teams-interact
With Exchange 2016 SP3 or later I should work, but you need to sync exchange properties with AADSync. Exchange EWS have to be published for your on-premises environment.- That means I have to start the Hybrid config in our ECP to make it work?
has-dbk No, you just have to make sure that your exchange servers are published in a correct way so it is accessible from internet. And make sure that when you are synching users from Windows Active Directory to Azure Active Directory (with Azure AD Connect / DirSync) that you sync exchange properties.
