Microsoft 365 Admin on J-Cave.dk

MD-102 Old vs New Exam

Mon, 19 Oct 2026 08:56:00 +0200

MD-102 Endpoint Administrator replaces MD-100 + MD-101

As Microsoft has been moving away from on-prem tools like SCCM and Domain Controllers to cloud they introduced a new exam to reflect this change towards the cloud and tools like Intune, Entra, and Autopilot. And for the new Endpoint Manager that also meant a new certification to replace the old MD-100 Windows Client, and MD-101 Managing Modern Desktops.

As a budding Systems Administrator, MD-102 Endpoint Administrator is a good way of learning about modern Endpoint Management and protection, as well as document my knowledge. But how much of the old ways should I also learn?

October 2026 for Microsoft admins: what changed on the 1st, and what ends on Patch Tuesday

Mon, 12 Oct 2026 08:00:00 +0200

Note

Updated 13 October 2026, after the release. This post went out the day before Patch Tuesday. It now says what actually shipped: 1,411 fixes, one of them for a flaw that is already being used in attacks, and one known issue with USB audio. The other sections are brought up to date as well.

Patch Tuesday was on 13 October, and this one was more than a batch of fixes. Several products got their last update on the same day, three things had already changed on 1 October, and a Secure Boot certificate expires six days later. Here is the month as a list, with what to check for each.

Windows 11 24H2 gets its last update on 13 October, and Windows 10 gets another year

Fri, 09 Oct 2026 08:00:00 +0200

Two Windows dates have been mixed together in a lot of headlines this autumn, so here they are, separated.

Windows 11, version 24H2, Home and Pro: the last update comes on Tuesday 13 October 2026 [1].
Windows 10: nothing ends this month. The extended security updates for home users, which were supposed to stop now, run until 12 October 2027 [2].

Windows 11 24H2: update to a newer version

Each yearly version of Windows 11 is only maintained for a limited time. For Home and Pro that is two years, and 24H2 came out on 1 October 2024 [1]. After 13 October, a PC that is still on 24H2 gets no more security fixes.

Office 2021 support ends on 13 October: what are your options?

Thu, 08 Oct 2026 08:00:00 +0200

On Tuesday 13 October 2026, Office 2021 gets its last update. That goes for the version you bought in a shop and for Office LTSC 2021, the version organisations buy through volume licensing [1] [2]. Microsoft leaves no opening: “there will be no extension and no extended security updates” [1].

What end of support means

Word and Excel will start on 14 October exactly as they did the day before. “All of your Office 2021 apps may continue to function. However, you could expose yourself to serious and potentially harmful security risks.” [1]

Teams and Copilot are moving to cloud.microsoft: check your allow-lists before October

Fri, 02 Oct 2026 08:47:00 +0200

Two of the most used Microsoft 365 web addresses are changing this autumn. Copilot is moving to copilot.cloud.microsoft and Teams on the web to teams.cloud.microsoft. If something in your network blocks *.cloud.microsoft, October is when your users find out.

What’s changing

Copilot: m365.cloud.microsoft becomes copilot.cloud.microsoft

In message center post MC1462915 Microsoft says it started redirecting users from m365.cloud.microsoft to copilot.cloud.microsoft in early September, in organisations where the new address is reachable. Everyone else gets redirected in early October [1]. If the address is blocked, the redirect happens anyway, and “affected users may be unable to use Copilot in the web app, desktop app, and Microsoft Edge experience” [1].

September 2026 Patch Tuesday broke Excel: the case for ring-based deployment

Mon, 28 Sep 2026 08:12:00 +0200

September’s Patch Tuesday was the biggest Microsoft has ever shipped, and one of the updates in it broke copy and paste in Excel. Together they make a good argument for something small IT departments often skip: letting a few people get the updates first.

What shipped on 8 September 2026

A record count, however you count it

How big depends on who you ask. BleepingComputer counted 966 vulnerabilities [1], Tenable 964 [2], the Zero Day Initiative 972 new Microsoft CVEs [3] and SecurityWeek 974 [4]. When I first noted the idea for this post I wrote down 973, which is roughly what you get from reading enough headlines.