Chris Allen's (CHALLEN) Exchange Blog
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What is KeepAliveTime used for in regards to Exchange?
This one setting has caused more debates and more confusion, and by proxy, more cases than perhaps...
Author: Gus Gallows Date: 04/15/2017
How did that 1.5GB message get into my Exchange environment anyway?
ISSUE: Recently, I had a customer call in an issue where their transport services were failing on...
Author: Gus Gallows Date: 04/15/2017
Owaproxy component is in Inactive State and will not successfully activate
ISSUE: My customer put their Exchange 2016 environment into maintenance mode so they could apply...
Author: Gus Gallows Date: 04/14/2017
Mailbox migration times out when going from Exchange OnPrem to O365
ISSUE: When attempting to migrate an onPrem User mailbox from Exchange 2013 to O365, the following...
Author: Gus Gallows Date: 04/14/2017
Mail not routing to on-premise Exchange 2013 environment from O365 with 450 4.7.320 Certificate validation failed error
Issue: User is trying to send email from his O365 Tenant in to the OnPrem Exchange 2013 environment....
Author: Gus Gallows Date: 04/14/2017
Email destined for recently moved Modern Public Folders are going to the Poison queue.
Scenario I recently worked a case where the customer had moved all of the public folders from one...
Author: Gus Gallows Date: 02/01/2017
O365 Migration that completes with warnings due to insufficient rights.
The Problem: With the rise in Hybrid configurations around the world, we are starting to see some...
Author: Gus Gallows Date: 01/27/2017
Only seeing first receive event when doing message tracking against a public folder that was migrated to O365 from Legacy Exchange
In Exchange 2010 and older (legacy exchange), when you migrate a public folder to O365, it makes a...
Author: Gus Gallows Date: 08/25/2016
Event 1035, MSExchangeTransport - Inbound authentication failed with error UnexpectedExchangeAuthBlob for Receive connector
Scenario Ran into an interesting case today where mail flow had quit working in one direction...
Author: Gus Gallows Date: 08/24/2016
1007 AccessDenied: Access Denied when trying to renew Federation Certificate
The 1007 AccessDenied event is usually tied to a time skew issue and that should always be confirmed...
Author: Gus Gallows Date: 07/27/2016
Shared Free/busy between two untrusted forests failing in one or both directions
In a recent case, I found a pretty common mistake many customers make when setting up their...
Author: Gus Gallows Date: 07/15/2016
Unable to expand legacy onPrem Public Folders with O365 account
I have been seeing a few scenarios lately where users who log into Exchange using an account other...
Author: Gus Gallows Date: 06/21/2016
Microsoft Filtering Management Service won't start on Exchange 2013
Issue In a recent case, the transport service on an exchange 2013 server was failing to start due to...
Author: Gus Gallows Date: 02/18/2016
Mitigating Mail Loops when using Auto Reply in Exchange 2010
Symptoms When you enable Auto Reply for the Default(*) Remote Domain in Exchange 2010, you are...
Author: Gus Gallows Date: 02/17/2016
Moving Queue Database to a Different Exchange Server
Recently, a customer asked me if there was a way to bulk move all of a pending queue from one server...
Author: Gus Gallows Date: 02/06/2016