DNS Archives - Practical 365

Getting Your DNS Ducks in a Row

Damian Scoles — Wed, 06 Sep 2023 10:00:00 +0000

In this article, Damian Scoles discusses what DNS records should be in place for Exchange Online, why these records are needed, and how to validate that DNS is properly configured.

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Why a Potential Autodiscover Flaw is Just the Tip of an Iceberg

Steve Goodman — Tue, 28 Sep 2021 05:55:00 +0000

It's often helpful when security researchers like Guardicore shed light on flaws in Microsoft Exchange - however, the Autodiscover protocol isn't flawed in the way they describe. Even though the issue is hard to replicate, it shouldn't distract from the work you need to do to protect your organization from the underlying reason why people want your credentials.

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Understanding the Impact of Latency on Office 365 Service Performance

Nicolas Blank — Tue, 25 May 2021 07:14:00 +0000

Many aging corporate networks were initially built to secure internet browsing traffic; however, this can create a slow user experience for those legitimately consuming cloud services. This article identifies contributing factors to network latency issues and the steps you can take to improve Office 365 service performance.

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Exchange Server 2016 Migration – Client Access Namespace Cutover

Paul Cunningham — Thu, 08 Dec 2016 05:28:29 +0000

Performing the cut over of client access namespaces during a migration to Exchange Server 2016.

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Emails from Website Not Received in Exchange or Exchange Online

Paul Cunningham — Tue, 22 Mar 2016 10:00:00 +0000

Emails sent using web forms on a website may not be received in the mailbox of the recipient due to a configuration or filtering issue.

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Event ID 9041, An exception has been thrown: Microsoft Exchange Assistants TransientMailboxException

Paul Cunningham — Tue, 12 Jan 2016 06:41:24 +0000

I recently encountered a mail flow problem between two of my test lab environments that was being caused by the DNS configuration on the receiving server's network interface.

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A Sender Policy Framework (SPF) Primer for Exchange Administrators

Paul Cunningham — Mon, 07 Dec 2015 11:00:03 +0000

Learn how Sender Policy Framework (SPF) records work to prevent email spoofing, and how you can implement the correct SPF record for your domain.

The post A Sender Policy Framework (SPF) Primer for Exchange Administrators appeared first on Practical 365.

Testing Connectivity and DNS Changes with a Hosts File

Paul Cunningham — Tue, 14 Jul 2015 12:32:35 +0000

How to use hosts files on client computers for Exchange Server testing and troubleshooting scenarios.

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Use PowerShell to Quickly Check Multiple MX Records

Paul Cunningham — Thu, 04 Jun 2015 12:46:36 +0000

How to use the Resolve-DnsName PowerShell cmdlet to query MX records for multiple domain names at once.

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Manually Configuring DNS Lookups for Exchange Server 2013

Paul Cunningham — Tue, 02 Apr 2013 10:37:10 +0000

How to manually configure the DNS servers used by Exchange Server 2013 for external lookups.

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