Microsoft has released security updates for vulnerabilities found in:
Exchange Server 2013
Exchange Server 2016
Exchange Server 2019
These updates are available for the following specific...
Updated May 04, 2021
Version 8.0
Blog Post
Hello @Nino Bilic,
We are running two Exchange 2013 CU23 installations on 2012 R2 with a cross forest configuration.
Update KB5001779 broke the ability to see the free/busy information of the other organization in both ways.
The only hints in the logs are:
Autodiscover,autodiscoverxxxxxxxxxx,/autodiscover/autodiscover.svc,,,false,,,,ASAutoDiscover/CrossForest/EmailDomain//15.00.1497.015,10.20.30.138,SERVERNAME,401,,UnauthenticatedRequest,POST,,,,,,,,,1338,,,,1,,,0,,0,,0,0,,0,9,0,,,,,,,,,0,8,0,,8,,9,9,,,,BeginRequest=2021-04-19T07:20:03.518Z;CorrelationID=<empty>;ProxyState-Run=None;ProxyState-Complete=CalculateBackEnd;EndRequest=2021-04-19T07:20:03.533Z;,
Autodiscover,autodiscovexxxxxxxxxx,/autodiscover/autodiscover.svc,,Negotiate,false,,,,ASAutoDiscover/CrossForest/EmailDomain//15.00.1497.015,10.20.30.138,SERVERNAME,401,,,POST,,,,,,,,,0,,,,,,,,,,,,,,,0,,,,,,,,,,,,,,0,,0,0,,,,BeginRequest=2021-04-19T07:20:03.549Z;CorrelationID=<empty>;EndRequest=2021-04-19T07:20:03.549Z;,
Is anyone experiencing similar/same issues?