Free/busy not working in Hybrid


In a Hybrid deployment, lately I had experienced that:
1. On-premise users can see cloud users’ free/busy
2. Cloud users cant see on-premise users free/busy
Note: the below may not solve your problem, but it should lead you to the right way to brute force your way to solve the problem lol
Resolution:
1. Try out the Hybrid Free/Busy Troubleshooting Tool.
3. Did an IISRESET as recommended: http://jesperstahle.azurewebsites.net/?p=242
4. Update/Refresh the Federation Metadata. See this blog for more information.
- Connect to Exchange Online in PoweShell
- Execute:
- Get-FederationTrust | Set-FederationTrust -RefreshMetadata
5. Execute the free/busy test from Microsoft Remote Analyzer
6. Ensure that in all Exchange Servers (including the inactive ones located in the DR sites), the Get-WebServicesVirtualDirectory has the correct ExternalURL: https://mail.contoso.com/ews/exchange.asmx (and is routable from the internet)
Get-WebServicesVirtualDirectory -Identity “ServerName\EWS (Default Web Site)”
Leave a comment if it’s still not working. No promise that I can help you fix, but I’ll try 🙂
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