Discover essential insights on Exchange 2016 and 2019 Extended Security Updates. Stay informed on support timelines and upgrade strategies for your organization https://eightwone.com/2025/07/16/exchange-2016-2019-esu/ #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 https://bit.ly/ETOSecChanges

PSA: In 3 months, legacy EXO tokens will get turned off https://aka.ms/NAAFAQ

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 https://office365itpros.com/2025/06/24/office-365-for-it-pros-2026-ed/ #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 https://techcommunity.microsoft.com/blog/exchange/upgrading-your-organization-from-current-versions-to-exchange-server-se/4241305?WT.mc_id=M365-MVP-5000284 #MSExchange

Timeline change for BasicAuth for SMTP AUTH deprecation (now starting mar'26, was sep'25) https://techcommunity.microsoft.com/blog/exchange/exchange-online-to-retire-basic-auth-for-client-submission-smtp-auth/4114750?WT.mc_id=M365-MVP-5000284 #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) https://github.com/michelderooij/Get-EventSession #MSBuild #PowerShell

Seems unaware orgs are hitting external recipient limits. Keep track of who sends out through your tenant, especially using hybrid, or eg app messages might cause blockade of more important things #MSExchange #TERRL #MC1023294 #EX1075036

Exchange PG looking for feedback on 1) EXOM PS "cmdlet modernization", 2) REST API for EXO Management https://techcommunity.microsoft.com/blog/exchange/give-us-feedback-on-exchange-online-cmdlet-changes-and-rest-api-availability-for/4412953?WT.mc_id=M365-MVP-5000284 #MSExchange #PowerShell

PSA reminder: Exchange Online will roll out enforcing Tenant External Recipient Rate Limit for remainder of WW tenants today https://bit.ly/ETOEXOTERRL #MSExchange

Exchange PG provided some early tools and reports to assist in EWS to Graph API changes https://devblogs.microsoft.com/microsoft365dev/exchange-web-services-code-analyzer-and-usage-report/?WT.mc_id=M365-MVP-5000284 #MSExchange #EWS #MSGraph

Office 365 for IT Pros and Automating Microsoft 365 with PowerShell: For less than $5 per month, get the most updated reference material maintained by team of experienced authors with real-world insights and management practices https://o365itpros.gumroad.com/l/O365IT #MSExchange #EntraID #Office365 #SPO #ODfB #Planner #Purview #MSGraph #PowerShell

ICYMI: Hotfix for Exchange 2019/2016 introducing dedicated Exchange Hybrid Application support, soon co-existence requirement - see https://eightwone.com/2025/04/29/hotfix-updates-exchange-2016-2019-apr2025/ #MSExchange #ExchangeHybrid

Expect shift towards automating certificate renewal: Gradually, lifetime will reduce to 47 days max in 2029. While sensible security measure, shops with legacy products might be challenged, or sysadmins will face a more frequent manual task https://www.digicert.com/blog/tls-certificate-lifetimes-will-officially-reduce-to-47-days #Security

PSA: Less than half a year until Exchange 2019 & 2016 reach End-of-Life #MSExchange https://bit.ly/ETOEx20162019EOL

PSA: Today, Exchange Online will start phased rollout of enforcing Tenant External Recipient Rate Limit https://bit.ly/ETOEXOTERRL