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Exchange Team Blog
13 MIN READ

Demystifying Hybrid Free/Busy: Finding errors and troubleshooting

The_Exchange_Team's avatar
The_Exchange_Team
Platinum Contributor
Mar 02, 2018
EDIT 9/19/2023: This blog post has received significant update. In this second part of the Demystifying Hybrid Free/Busy, we will cover troubleshooting of Hybrid Free/Busy scenarios, more specifica...
Updated Sep 19, 2023
Version 16.0
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Exchange 2010
Exchange 2013
exchange 2016
exchange online
hybrid
tips 'n tricks
troubleshooting
chris280's avatar
chris280
Copper Contributor
Jun 22, 2020
Any thoughts on what the issue is?
 
Performing Free/Busy LookupFree/Busy Lookup failed.
Additional Details
Free/Busy Lookup failed with exception: Proxy web request failed. , inner exception: System.Net.WebException: The request failed with HTTP status 504: Gateway Timeout. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.EndInvoke(IAsyncResult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.Proxy.Service.EndGetUserAvailability(IAsyncResult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.FreeBusyApplication.EndProxyWebRequest(ProxyWebRequest proxyWebRequest, QueryList queryList, IService service, IAsyncResult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.ProxyWebRequest.EndInvoke(IAsyncResult asyncResult) at Microsoft.Exchange.InfoWorker.Common.Availability.AsyncWebRequest.EndInvokeWithErrorHandling()