Forum Discussion
neilhiorns
May 28, 2021Copper Contributor
Hybrid Free Busy Issue
We are using Exchange 2016 CU20 and have setup hybrid connection to Exchange Online using the HCW and for our central site all is working well. However, we have some Exchange servers in other countri...
Joe Stocker
May 30, 2021Bronze Contributor
It can be several things but I usually recommend reading these articles first to make sure you have a supported design:
https://techcommunity.microsoft.com/t5/exchange-team-blog/the-hybrid-mesh/ba-p/605910
and
https://techcommunity.microsoft.com/t5/exchange-team-blog/demystifying-hybrid-free-busy-what-are-the-moving-parts/ba-p/607704
and
https://techcommunity.microsoft.com/t5/exchange-team-blog/demystifying-hybrid-free-busy-finding-errors-and-troubleshooting/ba-p/607727
I recommend running the tests on this website as it will often give you a helpful error message to research:
https://testconnectivity.microsoft.com/tests/o365
This article has saved me several times.
https://docs.microsoft.com/en-US/exchange/troubleshoot/calendars/cannot-view-freebusy-information-for-remote-user
Once I had to refresh the metadata with this command:
Get-FederationTrust | Set-FederationTrust -RefreshMetadata
These commands are helpful to run in the on-premises Exchange Management Shell:
Test-FederationTrust and Test-OrganizationRelationship
See what error messages you get.
https://techcommunity.microsoft.com/t5/exchange-team-blog/the-hybrid-mesh/ba-p/605910
and
https://techcommunity.microsoft.com/t5/exchange-team-blog/demystifying-hybrid-free-busy-what-are-the-moving-parts/ba-p/607704
and
https://techcommunity.microsoft.com/t5/exchange-team-blog/demystifying-hybrid-free-busy-finding-errors-and-troubleshooting/ba-p/607727
I recommend running the tests on this website as it will often give you a helpful error message to research:
https://testconnectivity.microsoft.com/tests/o365
This article has saved me several times.
https://docs.microsoft.com/en-US/exchange/troubleshoot/calendars/cannot-view-freebusy-information-for-remote-user
Once I had to refresh the metadata with this command:
Get-FederationTrust | Set-FederationTrust -RefreshMetadata
These commands are helpful to run in the on-premises Exchange Management Shell:
Test-FederationTrust and Test-OrganizationRelationship
See what error messages you get.