Forum Discussion
Teams calendar not syncing with exchange on-prem calendar
Julian12 Hello, can this assist you perhaps? https://docs.microsoft.com/en-us/exchange/hybrid-deployment/troubleshoot-a-hybrid-deployment
ChristianBergstromThx for the Link, I went through it an 2 things occured:
THe Inbound SMTP Mail test failed with error: 550 - Mailbox unavailable. The server response was: No RDNS entry for IP_ADDRESS
I think this is not problematic as this test fails too for a customer where sync is working.
Another issue is the used certificate which is configured only for the IIS service and not for SMTP. I tried to add SMTP via GUI and with exchange commandline but smtp service isn't added. I don't know this happens now as I'm logged in with the Administrator account and no error messages are displayed.
Besides these 2 isssues everything went fine.
Do you have an idea why adding the cert to the SMTP service is failing?
Julian12 Hello Julian, you mean nothing happens when you run this 'Enable-ExchangeCertificate <thumbprint> -services SMTP'?
I was going to suggest the solution described here https://support.microsoft.com/en-nz/help/2989382/can-t-receive-mail-in-a-hybrid-environment but as you cant add smtp it's a problem.
Have you had a look at this as well? https://docs.microsoft.com/en-us/exchange/architecture/client-access/assign-certificates-to-services?view=exchserver-2019
ChristianBergstromyes, nothing happens when I safe the menu in the gui or send the command in the shell.
Yes, I used the site you mentioned at the end.
Julian12 Can you use the Get-ExchangeCertificate cmdlet? How does it look? Did you check all prerequisites and proper permission?
As nothing happens when you're trying to Enable-ExchangeCertificate <Thumbprint> -Services SMTP it's quite difficult to figure out, but I believe this is as close as it gets from what you been experiencing.
https://social.technet.microsoft.com/Forums/office/en-US/b24a78c6-695a-4f70-917f-078160be6a6e/enableexchangecertificate-problem-with-smtp?forum=Exch2016MFSM
If that doesn't help you either, I have to ask you to reach out to the Exchange experts.
Good luck!