250 Hello - Exchange

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The Way Things Were–EOP IP Ranges October 2018

Posted on 3rd February 2022 by Rhoderick Milne [MSFT]

When discussing network configuration for Office 365, there will be a series of issues and challenges that need to be addressed. Ideally this is all done in a proactive manner, with the final items addressed in the POC phase.

One of the cornerstone issues is around how access to and from Office 365 will be managed. This has to address end user access from workstations and publishing your on-premi… Read the rest “The Way Things Were–EOP IP Ranges October 2018”

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Office 365 Autodiscover Lookup Process–Revisited

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

Previously we looked at the Office 2010 client and how it used Autodiscover to detect Exchange Online (EXO) mailbox settings. Outlook 2010 is no longer supported, so it is worth updating these notes for a current build of Outlook.

As with the previous post, this is intended as a point in time reference as I personally find it handy as an ongoing reference. In the updated example below a fully patc… Read the rest “Office 365 Autodiscover Lookup Process–Revisited”

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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?”

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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

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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”

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Exchange 2016 CU22 Released

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

Exchange 2016 CU22 has been released to the Microsoft download centre! Exchange 2016 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 2016 and can be used to install a fresh server or to update a previously installed one. Exchange 2013 h… Read the rest “Exchange 2016 CU22 Released”

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Exchange Online Transport Rule Audit

Posted on 27th September 2021 by Rhoderick Milne [MSFT]

This is a topic that still comes up when doing email investigations. After there has been an issue, we want to perform analysis to determine what may have happened any potentially why certain security controls did not act the way we expected.

With email one example would be around the audit information collected when an Exchange Online transport rule acts upon a message.

It is common to see that ad… Read the rest “Exchange Online Transport Rule Audit”

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Is Exchange Fully Updated? If Not, Go Update Now

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

The Exchange team just posted that the September 2021 updates are going to be slightly delayed. The priority will always be to ship quality updates rather than force it out to meet a specific day.

You can look at the announcement, and Nino's additional comments here:

Delay of September 2021 Cumulative Update for Exchange Server - Microsoft Tech Community

This means that we have a little bit more tim… Read the rest “Is Exchange Fully Updated? If Not, Go Update Now”

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Unable to Prepare Schema For Exchange Server 2019–Forest Functional Level

Posted on 16th September 2021 by Rhoderick Milne [MSFT]

Imagine that you have spent weeks planning for your upgrade to Exchange 2019. There are no unsupported down-level versions of Exchange, only Exchange 2016 is present. Those pesky public folders were also taken out behind the farmer's shed never to return. That only taken 15 or so years, but hey life is a journey...

Imagine your surprise when you go to perform step #1 which is extending the… Read the rest “Unable to Prepare Schema For Exchange Server 2019–Forest Functional Level”

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Exchange 2019 CU10 Released

Posted on 29th June 2021 by Rhoderick Milne [MSFT]

Exchange 2019 CU10 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 CU10 Released”