250 Hello - Exchange 2019

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Remediate Exchange Security CVE-2022-21978

Posted on 12th August 2022 by Rhoderick Milne [MSFT]

The May 2022 security update for Exchange Server 2013, 2016 and 2019 resolved CVE-2022-21978. A common issue is that admins are only doing part of the work to address this CVE. Yes they are installing the update, but are not reading the rest of the documentation which states that an additional command must be run.

The FAQ states:

Do I need to take further steps to be protected from this vulnerabil… Read the rest “Remediate Exchange Security CVE-2022-21978”

5

Implementing Exchange DownloadDomain Security

Posted on 20th July 2022 by Rhoderick Milne [MSFT]

In the field, I’m seeing multiple customers that are struggling to implement the DownloadDomain feature. It does require a little prep work and it is not as simple as just running a single command in Exchange to flip the setting on.

In order to mitigate and issue with OWA, it is necessary to create an additional CAS namespace that will be used for downloading attachments from OWA. This will requir… Read the rest “Implementing Exchange DownloadDomain Security”

2

Exchange 2019 Point of No Return

Posted on 12th July 2022 by Rhoderick Milne [MSFT]

Exchange 2019 PrepareAD - The Point of No Return

When designing an upgrade strategy from an older version of Exchange to a newer one, a question that needs to be addressed is do we need to introduce a version of Exchange that may not currently be present? This may be when upgrading from Exchange 2013 to Exchange 2019. If that organisation currently does not have any Exchange 2016 servers, you need to evaluate if there may be a future requireme… Read the rest “Exchange 2019 Point of No Return”

4

Exchange 2019 CU12 Released

Posted on 20th April 2022 by Rhoderick Milne [MSFT]

Exchange 2019 CU12 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 CU12 Released”

0

Microsoft Teams Source IP Address Used Connecting to On-Premises Exchange

Posted on 14th February 2022 by Rhoderick Milne [MSFT]

Teams IP Addresses Connecting to Exchange On-Premises

Planning to deploy Office 365 and integrate with your on-premises Exchange infrastructure? Great! While running the Exchange Hybrid Configuration Wizard (HCW) will be one of the highlights it should be a boring and uneventful portion of the project. That will be true if all of the required planning, remediation and preparation was done. If not you’ll be finding out about those issues pretty so… Read the rest “Microsoft Teams Source IP Address Used Connecting to On-Premises Exchange”

0

Change Certificate Friendly Name To Unique Value

Posted on 6th January 2022 by Rhoderick Milne [MSFT]

Imagine that you have two certificates installed, but for whatever reason the same friendly name was used for both of them. You can certainly identity each of them by comparing the valid from/valid to dates or the thumbprint. That adds just a little extra overhead that you may not want to deal with.

As an alternative, you can modify the friendly name to a more suitable value. This allows you to… Read the rest “Change Certificate Friendly Name To Unique Value”

0

Why Is The Exchange Security Update Not Installed?

Posted on 22nd November 2021 by Rhoderick Milne [MSFT]

The issue of "Why is the Exchange Security Update not installed?" has popped up frequently over the last few months due to the number of security releases for on-premises Exchange.

Due to Hafnium, security teams have increased the monitoring of Exchange to make sure that it is fully patched. In some of these cases, the Exchange and server admins think that they are all good as they run Windows Upd… Read the rest “Why Is The Exchange Security Update Not Installed?”

7

Unable To Renew Exchange Certificate – Friendly Name Is Too Long

Posted on 9th November 2021 by Rhoderick Milne [MSFT]

Your Exchange certificate is about to expire, so you initiate a standard process to renew it. It's only a 5 minute job as that's how long it took last time, right?

Well, no. All is fine until you try to renew the existing certificate. The easiest way to initiate the renewal is by using the Renew option in the Exchange Admin Center.

The current certificate is the one selected in the below screensho… Read the rest “Unable To Renew Exchange Certificate – Friendly Name Is Too Long”

2

Exchange 2016 CU22 and Exchange 2019 CU11 Setup Changes

Posted on 30th September 2021 by Rhoderick Milne [MSFT]

With the release of this month's Exchange updates, there are changes to not only the installation prerequisites but also the installation parameters.

These changes break down into two main areas. What you must ensure is installed prior to installing this or a subsequent CU, and secondly that the command line options have been updated along with the corresponding GUI.

To summarise:

IIS URL rewrite mo

… Read the rest

0

Exchange 2019 CU11 Released

Posted on 28th September 2021 by Rhoderick Milne [MSFT]

Exchange 2019 CU11 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 CU11 Released”