Forum Discussion
Calender in Teams not working with Onprem Mailboxes / Hybrid with Exchange 2016
Hi,
we have a hybrid echange 2016 with office 365. ADsync is working and we managed to succesfull config the classic hybrid. we can migrate mailboxes to the oline exchange, but most of the boxes are on the onprem exchange. we upgrades to Exchange 2016 CU16.
In Teams you can see the Calender in left pane, but it fails to show up -> Couldn´t load your calender. Lets give it another try
The HWC could be completed succesfully and the firewall daos not block anythin on port 80 or 443.
We tried with and without online exchange licences even for the onprem mailboxes. Only the User with Online Mailboxes can see the calender in teams. Same in Web and Desktop App.
Can anyone help what to check?
- Tushar Pathak
Microsoft
franz_muc Please double check Step 1 & step 5 from this article. Ensure EvoSts auth server is created and all EWS urls are added as SPNs
https://docs.microsoft.com/en-us/exchange/configure-oauth-authentication-between-exchange-and-exchange-online-organizations-exchange-2013-helpEvosts wird erstellt:
[PS] C:\Windows\system32>Get-AuthServer
Name IssuerIdentifier Realm TokenIssuingE
ndpoint
---- ---------------- ----- -------------
ACS 00000001-0000-0000-c000-000000000000 fa6091e2-d174-42cc-bb94-892e54872398 https://ac...
EvoSts https://sts.windows.net/fa6091e2-XXXXXXXXXXXXXXXXXXXXXXXXXXXX fa6091e2-d174-42cc-bb94-892e54872398 https://lo...und die richtigen Directories gibt es auch, sie zeigen auf die richtigen internen und externen adressen:
[PS] C:\Windows\system32>Get-MapiVirtualDirectory | FL server,*url*Server : XXXXX
InternalUrl : https://XXX.YYY.local/mapi
ExternalUrl : https://XXX.YYY.de/mapi[PS] C:\Windows\system32>Get-WebServicesVirtualDirectory | FL server,*url*
Server : XXX
InternalNLBBypassUrl :
InternalUrl : https://XXX.YYY.local/EWS/Exchange.asmx
ExternalUrl : https://XXX.YYY.de/ews/exchange.asmx[PS] C:\Windows\system32>Get-OABVirtualDirectory | FL server,*url*
Server : XXX
InternalUrl : https://XXX.YYY.local/OAB
ExternalUrl : https://XXX.YYY.de/OAB- Tushar Pathak
franz_muc Thanks! It could well be a connectivity issue. Please run Exchange RCA to check if you successfully connects to EWS externally (run the test from external machine).
https://testconnectivity.microsoft.com/Default.aspx?testId=ewsTask
Also ensure teams Ip address mentioned in below doc are whitelisted on firewall.
https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-ranges#skype-for-business-online-and-microsoft-teams
