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

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

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

PSA: In 1 week, Exchange Online auto-archving will be enabled for targeted release tenants https://xf.ms/EXOAutoArch

PSA: Today, Exchange Hybrid requires dedicated Hybrid App for cross-prem feats https://xf.ms/HybridAppReq

PSA: Tomorrow, Exchange Hybrid requires dedicated Hybrid App for cross-prem feats https://xf.ms/HybridAppReq

PSA: Today, Nested app auth & legacy EXO tokens start getting turned off https://xf.ms/NAAoff

PSA: Tomorrow, Nested app auth & legacy EXO tokens start getting turned off https://xf.ms/NAAoff

PSA: In 1 week, Exchange Hybrid requires dedicated Hybrid App for cross-prem feats https://xf.ms/HybridAppReq