Try our new Certificate Revocation List Check Tool
CRLcheck.exe is a tool developed to verify digital signatures of executable files. It collects files from known paths on your client, checks their signature, and checks Certificate Revocation Lists (CRL) and OCSP download. This helps avoid delays in launching files.

M365/Exchange Hybrid OAuth Testing command, OAuth-Cert out-of-sync 4001, IIS VDIR OAuth wrong

www.butsch.ch Resolve and find OAuth problem in Exchange Hybrid Setup Environment Short Understanding OAuth: OAuth (Open Authorization) is an industry-standard protocol that enables secure authorization for third-party applications without the need to disclose user credentials. It allows users to grant limited access to their resources on one site to another site, without sharing their credentials. […]

Verify if you are affected from MS EX1181125, new M365 group member added wrongly had OWNER permission 03.10-31.10.2025

Error: Some users added as members to a Microsoft 365 group in Outlook on the web may be given “Owner” permissions by default   Important Security Notice for M365 Groups Between October 3 and October 31, 2025, Microsoft Exchange Online experienced an issue that affected Microsoft 365 (M365) Groups. During this period, when a new […]

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Is your SBS environment update ready for 25H2 W11, SMB-Version, smbchecker.ps1

PowerShell script to check if you SMB setup is 25H2 ready   Windows 11 25H2 – Small Update, Big Impact for SMB Environments Windows 11 25H2 is now being offered on home and business systems as an Enablement Pack. This means it’s not a full new installation — instead, it’s a small ~50 MB update […]

WSUS Out of Band Patch Installer – CVE-2025-59287 for all OS automatic

Powershell skript to force the Out of band patches for WSUS Exploit fully automatic on WSUS. WSUS Out-of-Band Patch Installer – Overview (CVE-2025-59287) for all OS automatic Run our emergency skript direct on your WSUS Server. The 24.10.2025 emergency patches itself are in WSUS. If they are APROVED there our skript will install them from […]

W11 24H2 + Server 2025 Hotpatch without Reboot how to set VBS via GPO so it works

Hotpatching is coming to Windows 11 24H2 Enterprise E3+. Users will be able to patch “Security ONLY” updates on Patch Tuesday without requiring a reboot each time. W11 Hotpatch only available for Windows Enterprise E3 or E5 (e.g. Microsoft 365 A3/A5 or Microsoft 365 F3); or a Windows 365 Enterprise subscription. Windows 11 version 24H2 […]

Exchange Online SMTP Volumen Limiten für ausgehende E-Mail ab März 2025 – TERRL

Microsoft führt Limit für ausgehenden SMTP-E-Mail-Flow von Tenants ein Back to the roots? Ein weiterer neuer Grund wieso grössere Firmen gewisse Services zurück on-premise holen? Microsoft beschränkt künftig die Anzahl an E-Mails, die ein Tenant pro Tag versenden kann. Dabei ist zu beachten, dass auch Kalendereinladungen und Terminbenachrichtigungen als E-Mails gezählt werden. Falls durch fehlerhafte […]

Exchange Tenant, EXO, EWS Security change (Fehlervermeidung Security), 02-2025

Exchange Tenant, EXO, EWS Security change (Fehlervermeidung Security) Microsoft verbessert die Sicherheit von EWS und löst das Problem bei der Kombination von “per Tenant” und “per User” Rechten. Dies erleichtert es insbesondere grossen Unternehmen, Compliance-Vorgaben konsequent durchzusetzen. Ein wesentlicher Grund für diese Änderung ist, dass viele Personen im M365-Portal oder über Graph API Änderungen vornehmen, […]

Trellix ePolicy Orchestrator 5.10.0 Service Pack 1 Update 4

Trellix ePolicy Orchestrator 5.10.0 Service Pack 1 Update 4   We have installed the latest Update 4 on several customer on-premises EPO installation and the update works fine and without any problems. Key Considerations for Updating Trellix ePO 5.10 SP1 to the Latest Rollup 4 Check your ePO database size. Some Trellix SP or Rollup […]

Microsoft EDGE fails to Update from WSUS, from MSI-file or repair APPS because of GPO, 0x80070643, 1722

Microsoft EDGE fails to Update from WSUS, from MSI-file or repair APPS because of GPO, 0x80070643, 1722 Cause: GPO / EdgeUpdate Policies In this case, we have a GPO (Group Policy) created by or for a customer who uses Firefox as the default browser because a Citrix engineer advised them that this was the best […]