PSA: Tomorrow, Exchange 2019 & 2016 reach End-of-Life https://bit.ly/ETOEx20162019EOL

Hybrid Exchange issues with Free/Busy? It's planned nudge day 3 of 3. Test-OAuthConnectivity likely shows 403 error, eg running (mix with) Exchange with pre-April patch levels. Affected? Act soon, permanent after EoM! bit.ly/ETOSecChanges #MSExchange

PSA: In 1 week, AzureAD & AzureAD Preview modules retire https://bit.ly/AADModuleRetire

PSA: In 1 week, Exchange Online will start throttling MOERA domains https://bit.ly/MoeraThrottling

PSA: In 1 week, Exchange 2019 & 2016 reaches End-of-Life https://bit.ly/ETOEx20162019EOL

PSA: In 1 year, Exchange Hybrid needs Hybrid app w/GraphAPI perms & EXO retires EWS https://bit.ly/ETOEWSRetireEXO

PSA: In 6 months, Exchange Online starts phased rollout of enforcing Mailbox External Recipient Rate Limit https://bit.ly/ETOEXOERR

PSA: In 1 year, Exchange Hybrid needs Hybrid app w/GraphAPI perms & EXO retires EWS https://bit.ly/ETOEWSRetireEXO

PSA: In 1 month, Exchange Hybrid requires dedicated Hybrid App for cross-prem functionality https://bit.ly/ETOSecChanges

PSA: Today, legacy EXO tokens start getting turned off https://aka.ms/NAAFAQ

PSA: Tomorrow, legacy EXO tokens start getting turned off https://aka.ms/NAAFAQ

PSA: In 1 week, legacy EXO tokens start getting turned off https://aka.ms/NAAFAQ

PSA: In 1 month, Exchange Online will start throttling MOERA domains https://bit.ly/MoeraThrottling

PSA: In 1 month, AzureAD & AzureAD Preview modules retire https://bit.ly/AADModuleRetire

PSA: In 1 month, Exchange 2019 & 2016 reaches End-of-Life https://bit.ly/ETOEx20162019EOL

⚠️ Running Exchange Hybrid with mailboxes on-prem & EXO, run pre-Apr2025 HU builds and not configure dedicated hybrid app? Scheduled disruptions Sep16 7am-Sep18 7am in GMT. Symptoms: broken F/B, MailTips or profile pic. Info at techcommunity.microsoft.com/blog/exchang... #MSExchange

PSA: Hotfixes arrived for Exchange 2016-SE to fix a cross-prem issue for the Move to Archive retention tag using dedicated Hybrid app eightwone.com/2025/09/08/h... #MSExchange

PSA: In 6 months, Exchange Online starts retiring SMTP AUTH https://bit.ly/ETOSMTPAuthRetireEXO

PSA: Today, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

PSA: Today, Exchange Online starts retiring Client Access Rules https://bit.ly/ETOCARDeprecation

Expert author team processes updates to provide you an up-to-date copy of this book. Every. Month. For mere $5/m you also get M365 Automation w/PowerShell. Update no.123 came out, available for subscribers now. Interested? Visit o365itpros.gumroad.com/l/O365IT Disclaimer: I'm part of author team

PSA: Tomorrow, Exchange Online starts retiring Client Access Rules https://bit.ly/ETOCARDeprecation

PSA: Tomorrow, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

PSA: In 3 days, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

PSA: In 3 days, Exchange Online starts retiring Client Access Rules https://bit.ly/ETOCARDeprecation

PSA: In 1 week, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

PSA: In 1 week, Exchange Online starts retiring Client Access Rules https://bit.ly/ETOCARDeprecation

PSA: Connect-Office365Services 3.50 with module (un)install function, Select-Office365Modules github.com/michelderooi... #PowerShell #Office365

In addition to Group SOA Preview, Remote Mailbox SOA Preview also arrived today techcommunity.microsoft.com/blog/exchang... #MSExchange #Hybrid #LES

PSA: In 2 weeks, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

ICYMI: Happy Patch Tuesday! Security Updates Exchange 2016-2019 & SE (Aug2025) are here eightwone.com/2025/08/12/s... #MSExchange

Sneak peek for module (de)installation option in Connect-Office365Services. Would that delight some console people? #Office365 #PowerShell

Congrats to the team for reaching this milestone! If you haven't checked it out yet, and work with APIs such as MS Graph, have a look at this API sim to make more reliable, robust code #MSGraph

Still running unsupported Exchange on-premises in rich hybrid, or you are, but have not configured a dedicated hybrid app? MS will nudge you to make these changes by disrupting co-existence feats on specific dates techcommunity.microsoft.com/blog/exchang...

Finally found some time for some long overdue cleanup of my Exchange toolkit page. Feedback or suggestions? Let me know eightwone.com/exchange-too... #MSExchange

Look what arrived: Configure Group Source of Authority (SOA) (Preview) learn.microsoft.com/entra/identi... #MSEntra #MSExchange

PSA: In 1 month, Exchange Online deprecates old message trace UI & cmdlets for WW https://bit.ly/EXOMessageTraceV2

PSA: In 1 month, Exchange Online starts retiring Client Access Rules https://bit.ly/ETOCARDeprecation

Time for the yearly movers and shakers overview: MVPs around the World 2025 eightwone.com/2025/07/30/m... #MVPBuzz

ICYMI: Cross-tenant sync feature no longer unsupported for cross-org syncing, but with a disclaimer regarding privacy and consent. Might also be helpful in GALsync-like scenarios #EntraID learn.microsoft.com/en-us/entra/...

Discover essential insights on Exchange 2016 and 2019 Extended Security Updates. Stay informed on support timelines and upgrade strategies for your organization eightwone.com/2025/07/16/e... #MSExchange

PSA: In 3 months, AzureAD & AzureAD Preview modules stops functioning https://bit.ly/AADModuleRetire

PSA: In 3 months, Exchange 2019 & 2016 reaches End-of-Life https://bit.ly/ETOEx20162019EOL

PSA: Do not - I repeat, do NOT - attempt an in-place upgrade of the Operating System of existing Exchange servers. Also, do not attempt to mix OSes within the same DAG; new OS = new Exchange Server = new DAG. That'll be all. #MSExchange

PSA: In 3 months, Exchange Hybrid will require dedicated Hybrid App for cross-prem functionality bit.ly/ETOSecChanges

Office 365 for IT Pros 2026 edition is almost there! Want to know more about the book, release process, or simply how to subscribe to this most updated reference material office365itpros.com/2025/06/24/o... #MSExchange #EntraID #Office365 #SPO #ODfB #Planner #Purview #MSGraph

ICYMI: Upgrading to Exchange SE blog has been updated with CU2, updated timelines and coexistence info, see techcommunity.microsoft.com/blog/exchang... #MSExchange

Timeline change for BasicAuth for SMTP AUTH deprecation (now starting mar'26, was sep'25) techcommunity.microsoft.com/blog/exchang... #MSExchange

May 2025 brings essential hotfix updates for Exchange 2016 and 2019, enhancing security and performance for users. Stay updated! https://eightwone.com/2025/05/29/hotfix-updates-exchange-2016-2019-may2025/

PSA: Get-EventSession.ps1 4.3 adds Build 2025 support. Some functionality (eg format) lost due to changed hosting (for now) github.com/michelderooi... #MSBuild #PowerShell