Messaging

Items related to messaging services with a focus on Exchange Online (EXO) and Exchange server (on-premises)

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Azure Communication Service Email – MX Record Required

Posted on by Rhoderick Milne [MSFT]
Azure Communication Service Email - MX Required

Azure Communication Services (ACS) can be used to send high volume outbound email to Internet recipients, represents an important shift in Microsoft’s messaging architecture. As organizations modernised their cloud communications to Exchange Online (EXO) many of them just kept doing what they were doing with Exchange on-premises, i.e. using that as a bulk mailer to send out high volume email inter… Read the rest “Azure Communication Service Email – MX Record Required”

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Unable To Access OWA Externally Via WAP 2025 – Still Working On It

Posted on by Rhoderick Milne [MSFT]
Unable to Access OWA via WAP 2025 - Still Working On It

After upgrading Web Application Proxy (WAP) to Windows Server 2025 you may run into an issue with certain applications that are published via WAP to the Internet.  This issue will also happen if you build a net new environment for both WAP 2019 and newer.  This post discusses WAP 2025, but the same is more than likely going to happen with WAP 2022

In the below example the AD FS upgrade went well wi… Read the rest “Unable To Access OWA Externally Via WAP 2025 – Still Working On It”

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SPF Record Fun

Posted on by Rhoderick Milne [MSFT]
SPF Record Structure

Sender Policy Framework (SPF) is a fundamental component of modern e-mail authentication, designed to reduce the risk of spoofing and phishing attacks. By publishing a DNS record that specifies which mail servers are authorised to send messages on behalf of a domain, SPF allows receiving systems to validate whether an incoming message genuinely originates from the claimed sender. SPF alone does no… Read the rest “SPF Record Fun”

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Exchange Server SE Installation & Upgrade Screenshots

Posted on by Rhoderick Milne [MSFT]
Exchange Sever SE Installation Screenshots

In this post we’re capturing a point-in-time reference of the Exchange Server Subscription Edition installation process. As Microsoft continues to evolve Exchange with its subscription-based model, setup screens, prerequisites, and configuration options may change over time. The goal here isn’t to walk through the steps in detail, but simply to document what the installation experience looks like … Read the rest “Exchange Server SE Installation & Upgrade Screenshots”

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TLS Web Services Support On Exchange Server 2019 CU14 vs CU15

Posted on by Rhoderick Milne [MSFT]
Exchange Server 2019 CU15 TLS Scan Results

Transport Layer Security (TLS) has always been a critical component of securing communications in Microsoft Exchange Server, ensuring confidentiality and integrity of email traffic both internally and externally. With Exchange Server 2019, Microsoft has steadily evolved TLS support to align with modern security standards and deprecate older, weaker protocols. A notable shift came between Cumulativ… Read the rest “TLS Web Services Support On Exchange Server 2019 CU14 vs CU15”

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Azure Communication Service – Enable DKIM Signing

Posted on by Rhoderick Milne [MSFT]
Azure Communication Service - Enable DKIM Signing

When sending email through Azure Communication Services (ACS), proper sender authentication is essential to ensure that your messages are trusted and successfully delivered. DomainKeys Identified Mail (DKIM) is one of the key technologies that provides this assurance by digitally signing each outgoing message.  This allows recipient mail systems to verify that the email was not altered and genuine… Read the rest “Azure Communication Service – Enable DKIM Signing”

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Exchange 2019 CU15 Released (2025 H1)

Posted on by Rhoderick Milne [MSFT]
Exchange 2019 CU15 Released

Exchange 2019 CU15 has been released to the Microsoft Volume Licensing Center and the public Microsoft Download site!  Exchange 2019 has a different servicing strategy than Exchange 2007/2010 and utilises Cumulative Updates (CUs) rather than the Rollup Updates (RU/UR) which were used previously.    CUs are a complete installation of Exchange 2019 and can be used to install a fresh server or to upd… Read the rest “Exchange 2019 CU15 Released (2025 H1)”

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Lab–Move Exchange Server To New Tenant

Posted on by Rhoderick Milne [MSFT]

Moving a deployed Exchange hybrid environment to a brand new tenant is not something that is typically done.  In all of the years that I've worked with customers on hybrid, a second hand is not needed to count those instances.  The biggest reason for customers doing it was they did not like the tenant name, and wanted to change it.

In this case it was becase the tenant was being forcibly removed du… Read the rest “Lab–Move Exchange Server To New Tenant”

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Save The Date 14th October 2025

Posted on by Rhoderick Milne [MSFT]
Exchange Server 2019 End of Support Dates

The 14th of October 2025 marks another pivotal moment in Microsoft’s product lifecycle, as a large spectrum of very popular and widely deployed software reaches end-of-support. This includes Windows 10 and Windows 11 22H2.  On the productivity front, the extended support for Office 2016 and 2019, along with Visio 2016/2019, Project 2016/2019, and server-side tools like Exchange Server 2016/2019, S… Read the rest “Save The Date 14th October 2025”

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QuickTip – PowerShell Error Due Missing Hyphen

Posted on by Rhoderick Milne [MSFT]

When working with PowerShell, even small formatting issues can cause big problems. A common culprit is the use of “smart quotes,” which look correct but aren’t expected the ASCII character that PowerShell requires.  This leads to frustrating command failures.  In many cases his is because blogging software replaces the standard quote with a "smart quote" automatically.  We can fix that with a Word… Read the rest “QuickTip – PowerShell Error Due Missing Hyphen”