Happy Patch Tuesday: Exchange Security Updates June 2026 (Exchange SE/2019/2016) techcommunity.microsoft.com/blog/exchang... #MSExchange

Want to watch Build 2026 sessions offline? I have updated the Get-EventSession script to add Build support, among some other changes. Check it out at github.com/michelderooi... #MSBuild #Build2026

The June update (#132) for the #Office365 for IT Pros eBook is available for subscribers to download. This is the last update for the 2026 edition. We will publish the 2027 edition next month with some major changes to our content. Read more at office365itpros.com/2026/06/01/o... #Microsoft365

PSA: In 1 month, EWS block enforced for EXO mailboxes with Kiosk/Frontline SKUs https://xf.ms/NoEWSEnforced

For those working with Firefox & using PIM in Entra - just updated the PIMfox, the PIM role activation plug-in to 1.3.0 addons.mozilla.org/en-US/firefo... #Entra #MSEntra

Finally converted Connect-Office365Services to a PowerShell module github.com/michelderooi... - Also available from PSGallery #Microsoft365

blog: Hotfix Update Exchange SE (May2026) & (re)run ConfigureExchangeHybridApplication to enable Graph-based rich coexistence workflows eightwone.com/2026/05/09/h... #MSExchange

The Exchange Deployment and Compliance Tool has been updated to 1.0.0.0; consult the Changelog for changes github.com/michelderooi... For example, EDCA is now available from the PowerShell Gallery www.powershellgallery.com/packages/EDCA #MSExchange #Security #NIS2 #CIS #ANSSI #BSI #CISA #ISM #DISA

So, I vibe-coded a thing: EDCA, your Exchange Deployment & Compliance Assessment tool. Read the blog for more info - preview , feedback much welcomed eightwone.com/2026/04/23/e... #MSExchange #Security

Microsoft announced Period 2 of the Exchange Server 2016/2019 Extended Security Update (ESU) program, which provides continued access to any security updates for legacy on‑premises Exchange environments. While ESUs extend time, orgs cannot avoid the inevitable xf.ms/Ex20192016ESU2 #MSExchange

PSA: Today, Extended Security Update (ESU) period Exchange 2019 & 2016 ends https://xf.ms/Exchange20192016ESU

PSA: Tomorrow, Extended Security Update (ESU) period Exchange 2019 & 2016 ends https://xf.ms/Exchange20192016ESU

We've released the April 2026 update (monthly update #130) for the Office 365 for IT Pros eBook. The Automating #Microsoft365 with #PowerShell eBook (included in the bundle) is also updated. Subscribers, please download! office365itpros.com/2026/04/01/o...

PSA: In 6 months, Exchange Online starts retiring Exchange Web Services (EWS) https://xf.ms/EXORetireEWS

PSA: In 1 month, Extended Security Update (ESU) period Exchange 2019 & 2016 ends https://xf.ms/Exchange20192016ESU

PSA: In 6 months, Exchange Hybrid requires Hybrid app w/GraphAPI perms https://xf.ms/HybridAppReq

Achievement Unlocked! cc/ @exchangegoddess.bsky.social

PSA: In 3 months, EWS block enforced for EXO mailboxes with Kiosk/Frontline SKUs https://xf.ms/NoEWSEnforced

PSA: In 3 months, EWS block enforced for EXO mailboxes with Kiosk/Frontline SKUs https://xf.ms/NoEWSEnforced

Scripters and vendors take note: Starting Dec 31, changing sensitive properties of messages through Graph will require specific permissions, tightening immutability of received messages xf.ms/EXOMsgImmuta...

PSA: Today, Exchange Online requires trusting DigiCert Root G2 CA chain to avoid disruption https://xf.ms/DigiCertRootG2

PSA: Tomorrow, Exchange Online requires trusting DigiCert Root G2 CA chain to avoid disruption https://xf.ms/DigiCertRootG2

PSA: In 1 week, Exchange Online requires trusting DigiCert Root G2 CA chain to avoid disruption https://xf.ms/DigiCertRootG2

PSA: Today, EXO will block native email apps using EAS<16.1 https://xf.ms/PreEAS61Block

PSA: Tomorrow, EXO will block native email apps using EAS<16.1 https://xf.ms/PreEAS61Block

PSA: In 1 week, EXO will block native email apps using EAS<16.1 https://xf.ms/PreEAS61Block

PSA: In 1 month, Exchange Online requires trusting DigiCert Root G2 CA chain to avoid disruption https://xf.ms/DigiCertRootG2

Just vibe-updated PIMfox, the PIM activator for Firefox extension to v1.1.0, with support for PIM Groups github.com/michelderooi... #Entra

The February 2026 (monthly update #128) EPUB and PDF files for the #Office365 for IT Pros eBook are now available for current subscribers to download. All the #Microsoft365 news that's fit to print... office365itpros.com/2026/02/02/o...

So, I vibe coded this thing for Entra & Azure administrators too attached to using Firefox addons.mozilla.org/en-US/firefo... #EntraID #Security #Firefox

PSA: In 1 month, EXO will block native email apps using EAS<16.1 xf.ms/PreEAS61Block

ICYMI: Timeline for SMTP AUTH w/Basic Authentication retirement updated: ✅ End of Dec2026: Disabled existing tenants, w/option to enable. ✅ Jan2027: Unavailable for new tenants. ✅ Mid2027: Final EOL date announcement See techcommunity.microsoft.com/blog/exchang...

France is having a go at something other countries tried before: build a sovereign alternative to Teams. 2027 seems optimistic, but let's see. Likely default will be to be unavailable during non-working hours, and a sneak peek at the new status option www.euronews.com/next/2026/01... #MSTeams

Happy New Year to all. We've just released monthly update #127 for the #Office365 for IT Pros eBook. Current subscribers can download the new EPUB and PDF files now. Have fun and success with #Microsoft365 in 2026! office365itpros.com/2026/01/01/o...

PSA: In 3 months, Exchange Online starts rollout of enforcing Mailbox External Recipient Rate Limit https://xf.ms/EXOERR

PSA: In 1 year, Office Online Server will retire https://xf.ms/OOSretirement

PSA: In 6 months, EWS block enforced for EXO mailboxes with Kiosk/Frontline SKUs https://xf.ms/NoEWSEnforced

PSA: In 6 months, EWS block enforced for EXO mailboxes with Kiosk/Frontline SKUs https://xf.ms/NoEWSEnforced

PSA: EWS block enforcement for Kiosk/Frontline SKUs has been moved back to the end of June xf.ms/NoEWSEnforced #MSExchange #Microsoft365

PSA: Today, EXO Set/Get-Contact will be deprecated for Contact mgt https://xf.ms/EXOContactUpd

PSA: Tomorrow, Exchange Online Set/Get-Contact will be deprecated https://xf.ms/EXOContactUpd

Also got a huge collection of event videos or slidedecks? Want to lower its footprint? I published 2 scripts to help with that by compressing and downscaling videos or media, now part of my Get-EventSession repo github.com/michelderooi... #PowerShell

PSA: In 1 week, Exchange Online Set/Get-Contact will be deprecated https://xf.ms/EXOContactUpd

Planning on certifying over the holidays? Humble Bundle might have interesting offer (if you don't mind reading from PDF) - Exam Prep bundle including AI900, AZ900, AZ104, AZ500, SC100 a.o. www.humblebundle.com/books/micros...

Heads-up: EWS blockage for Exchange Online mailboxes with Kiosk/F1/F3 license, which officially do not offer EWS access, will be enforced March 2026 xf.ms/NoEWSEnforced #MSExchange

PSA: In 3 months, Exchange Online starts retiring SMTP AUTH w/BasicAuth https://xf.ms/SmtpAuthRetire

Here's the Black Friday discount code to get 50% off the Office 365 for IT Pros eBook (including the Automating #Microsoft365 with #PowerShell eBook). Code terminates on Tuesday. If you're running a Microsoft 365 tenant, you need this book: o365itpros.gumroad.com/l/O365IT/Bla...

PSA: Exchange Online Admin API (EWS replacement subset) now available (preview). REST-like alternative for some EWS scenarios, but not full REST replacement; cmdlets still recommended for full functionality techcommunity.microsoft.com/blog/exchang... #MSExchange #EWS

.. what does it mean? 🤔

PSA: Today, Exchange Online auto-archving will be enabled for targeted release tenants https://xf.ms/EXOAutoArch