EXCHANGE

Hi All,

SWITCH operates as the official registry for Switzerland’s .ch and Liechtenstein’s .li country-code top-level domains (ccTLDs). It maintains the central database of all .ch domain names and runs the DNS infrastructure, ensuring that the Swiss internet remains stable and secure. This role is mandated by the Federal Office of Communications (OFCOM), as the DNS is considered part of Switzerland’s critical infrastructure

Switch DNS Resilience Dashboard

Do you know the Switch DNS Resilience Dashboard

Hi All,

Did you notice that the EntraID User Accounts are now disabled when you create Shared Mailboxes in Exchange Online?

In April this of Year i saw, that Shared Mailboxes in Exchange Online had disabled Entra Accounts. But it was not consistent in diffrent Tenants and disappeared after a few days.

Now i have retested this, and the Entra ID Accounts of Shared Mailboxes are now disabled. I can’t tell when this change was implemented and i didn’t see any Documentation or Information in the Message Center - but it’s possible i’ve overseen that. Anybody has more Information?

Hi All,

Microsoft has released the Exchange Server Security Updates yesterday for these Exchange Server Versions:

• Exchange Server Subscription Edition (SE)
• Exchange Server 2019
• Exchange Server 2016

October 2025 SUs are the last publicly available SUs for Exchange Server 2016 and 2019. From this point forward, only customers who contacted their Microsoft Account Teams to get the Extended Security Update (ESU) for those versions will receive new SUs that we might release for Exchange 2016 and 2019, through April 2026.

Hi All,

Until now, for a Hybrid Deployment with Entra Connect Sync or Cloud Sync it was required to have an Exchange Server OnPrem or to use Exchange Recipient Management.

A few Weeks ago, Microsoft has published an Article with another Option.

• Introducing Cloud-Managed Remote Mailboxes: a Step to Last Exchange Server Retirement

With the Introducion of the “IsExchangeCloudManaged” Attribute, you can change the source of authority (SOA) from an OnPrem Synced Object for the Exchange Attributes (like Emailaddresses, Alias, HideFromAddressList, ExtensionAttributes) from OnPrem to the Cloud.

Hi All,

Microsoft has released the Exchange Server Security Updates yesterday for all currently supported Versions:

• Exchange Server Subscription Edition (SE)
• Exchange Server 2019
• Exchange Server 2016

Exchange Team Blog Article

• Released: September 2025 Exchange Server Hotfix Updates

• Hotfix update for Exchange Server Subscription Edition RTM HU2: September 8, 2025 (KB5066373)
• Online archiving fails for on-premises users in hybrid environment

Issues that this hotfix update fixes:

• ​​​​​​​Online archiving fails for on-premises users in hybrid environment using the dedicated Hybrid App

Exchange Server Subscription Edition

In my case, i’ve downloaded the Security Update for Exchange Server Subscription Edition

Hi All,

A few hours ago, Microsoft has released the ExchangeOnlineManagement 3.9.0 PowerShell Module. I don’t know what magic they used, but it was not there yesterday.

• PowerShell Gallery ExchangeOnlineManagement 3.9.0

v3.9.0:

• Introduce -EnableSearchOnlySession switch in Connect-IPPSSession cmdlet, which enables certain eDiscovery and related cmdlets that connect to other M365 services

I am using the new PSResourceGet here instead of the PowerShellGet commands.

Show installed Versions and what’s available in PowerShell Gallery.

Hi All,

Microsoft has released the Exchange Server Security Updates yesterday for all currently supported Versions:

• Exchange Server Subscription Edition (SE)
• Exchange Server 2019
• Exchange Server 2016

Exchange Team Blog Article

• Released: August 2025 Exchange Server Security Updates

Exchange Server Subscription Edition

In my case, i’ve downloaded the Security Update for Exchange Server Subscription Edition

• Security Update for Exchange Server Subscription Edition SU1 (KB5063224)
• Description of the security update for Microsoft Exchange Server Subscription Edition RTM: August 12, 2025 (KB5063224)

Hi All,

Just a few days ago, Microsoft has announced that the updated Hybrid configuration Wizard (HCW) now supports the Configuration of the Dedicated Hybrid App.

• Dedicated Hybrid App: temporary enforcements, new HCW and possible hybrid functionality disruptions
• CVE-2025-53786 Microsoft Exchange Server Hybrid Deployment Elevation of Privilege Vulnerability

Microsoft has also announced some block Tests. As the Adoption of Dedicated Hybrid App does not seem at the Level Microsoft is expecting.

Hi All,

A few days ago, Microsoft has released the ExchangeOnlineManagement 3.9.0-Preview1 PowerShell Module.

• PowerShell Gallery ExchangeOnlineManagement 3.9.0-Preview1

v3.9.0-Preview1:

• Introduce -EnableSearchOnlySession switch in Connect-IPPSSession cmdlet, which enables certain eDiscovery and related cmdlets that connect to other M365 services

I am using the new PSResourceGet here instead of the PowerShellGet commands.

Show installed Versions and what’s available in PowerShell Gallery. You need to use the -Prerelease Parameter to show Preview Versions of a Module

Hi All,

I’ve found an Issue in my Get-Mailprotection Script and fixed it. The updated Version has been released.

• PowerShell Gallery Get-Mailprotection 1.17

Release Notes 1.17

• Fixed Bug Autodiscover A Record

I am using the new PSResourceGet here instead of the PowerShellGet commands.

Show installed Versions and what’s available in PowerShell Gallery

Get-InstalledPSResource -Name Get-Mailprotection -Scope CurrentUser
Find-PSResource -Name Get-Mailprotection

Uninstall old Version and install new Version

Uninstall-PSResource -Name Get-Mailprotection -Scope CurrentUser
Install-PSResource -Name Get-Mailprotection -Scope CurrentUser
Get-InstalledPSResource -Name Get-Mailprotection -Scope CurrentUser