A blog about virtualization, cloud, storage, networking and IT stuff.
vCenter vLCM and HPE ILO Amplifier: Error occured during compliance scan
Using NetScaler Responder policies to log source ip-address
External E-Mail tagging in Exchange Online
hpe_hba_cabling_check falsely issues a warning
Deploying CEP/ CES using a gMSA
ArubaOS: Encrypt credentials in config files
Deploying Joplin Server on Docker
Using dnsforge.de on your homenetwork
Redistribute VMs according to a stored mapping
VMware is now Broadcom - time to move on
Wartungsenster Podcast
From Wordpress to Hugo in three days
About me
Imprint
Failed to connect to IKEv2 VPN using iPhone USB tethering
Why you should change your KRBTGT password prior disabling RC4
Use app-only authentication with the Microsoft Graph PowerShell SDK
Getting started with the Microsoft Graph PowerShell SDK
Microsoft rolls back decision to block Office macros by default
Wartungsfenster Podcast
Upgrade to ESXi 7.0: Missing dependencies VIBs Error
Mail notification for specific Active Directory security events
Outlook Web Access fails with "440 Login Timeout"
Modify ProxyAddresses of Office 365 users without Exchange Online
Escaping special characters in proxy auth passwords in vCenter
On the road to... nowhere?
Configure VMware Horizon View client device certificate authentication
VMware vCenter 7.0 U2 deployment fails at stage 2
Veeam B&R backup failes with "No scale-out repository extents are available"
WatchGuard Network Security Essentials Exam
VCAP-DCV Design 2021 - Objective 1.1 Gather and analyze business requirements
VMware Certified Advanced Professional 6.5 – Data Center Virtualization Design Exam (VCAP-DCV Design 2021)
Two registry changes to improve physical Horizon View Agent experience
MFA disabled, but Azure asks for second factor?!
vCenter Server migration to 6.7 fails with "Failed to check VMware STS. The SSL certificate of STS service cannot be verified"
Details on Windows 10 E3/ E5 Subscription Activation
Horizon View - Why Automated Desktop Pools with Full Clones are still a thing
Adobe Flash will die and how does this affects VMware
Exchange HCW8078 - Migration Endpoint could not be created
Moving a small on-prem environment to Azure/ O365 – Part 2
VMware ESXi 6.7 memory health warnings after ProLiant SPP
Exchange Control Panel /ecp broken after certificate replacement
Moving a small on-prem environment to Azure/ O365 - Part 1
Setup the View Agent Direct-Connection (VADC) Plug-In
Installation von Horizon View Agent fails continuously with "The System must be rebooted before installation can continue"
Update Manager fails with unknown error during host remediation
Virtually reseated: Reset blade in a HPE C7000 enclosure
Access to on-premise hosted Public Folders using Exchange Online mailboxes
Office365/ Exchange OAuth errors after replacing TLS certificate
Once in a year: How to update TLS certificates on ADFS server and proxies
Passed Microsoft exam AZ-103 - Azure Administrator Associate
Fan health sensors report false alarms on HPE Gen10 Servers with ESXi 6.7
Missing Microsoft Teams calendar tab with on-premise Exchange
Connecting to Exchange Online with PowerShell
Space reclamation of VMFS 5 Datastores using esxcli
VCAP6.5-DCV Design - Objective 2.4 Build manageability requirements into a vSphere 6.x logical design
VCAP6.5-DCV Design - Objective 2.3 Build availability requirements into a vSphere 6.x logical design
Why we need a vSAN licensing for SMB customers
VMware ESXi 6.7: Recurring host hardware sensor state alarm
VCAP6.5-DCV Design – Objective 2.2 Map service dependencies
Load balancing ADFS and ADFS Proxy using Citrix ADC
vCenter Migration from 6.0 to 6.7 fails due to missing user role
VCAP6.5-DCV Design – Objective 2.1 Map business requirements to a vSphere 6.x logical design
Microsoft Exchange 2013/ 2016/ 2019 shows blank ECP & OWA after changes to SSL certificates
Supported Active Directory environments for Microsoft Exchange
What’s new in Vembu BDR Suite v4.0.1
VCAP6.5-DCV Design - Objective 1.3 Determine risks, requirements, constraints, and assumptions
NetScaler Gateway - Cannot complete your request
VCAP6.5-DCV Design – Objective 1.2 Gather and analyze application requirements
Out of space - first steps when a datastore runs out of space
User vdcs does not have the expected uid 1006
Poor performance with Windows 10/ 2019 1809 on VMFS 6
Make your life easier - KeeAgent for KeePass
Vembu CloudDR - Disaster Recovery as a Cloud Service
Vembu BDR Essentials – Now up to 10 CPU Sockets
Securing VMs - vTPM, VBS, KMS and why you should not simply add a vTPM
Notes for a 2-Tier Microsoft Windows PKI
Veeam B&R: "Rescan of Manually Added" failed
Windows NPS - Authentication failed with error code 16
Help Vembu and win a gift card!
Client-specific message size limits - or the reason why iOS won't sent emails
Veeam Backup & Replication: Backup of Microsoft Active Directory Domain Controller VMs
Veeam and StoreOnce: Wrong FC-HBA driver/ firmware causes Windows BSoD
Database Availability Group (DAG) witness is in a failed state
Out-of-Office replies are dropped due to empty MAIL FROM
Vembu BDR Suite v4.0 is now generally available
Exam prep & experience: Citrix NetScaler Advanced Topics: Security, Management, and Optimization (1Y0-340)
Vembu VMBackup Deployment Scenarios
"Cannot execute upgrade script on host" during ESXi 6.5 upgrade
High CPU usage on Citrix ADC VPX
Using Let's Encrypt DNS-01 challenge validation with local BIND instance
EAPoL forwarding on NEC VoIP phones
Powering on a VM with shared VMDK fails after extending a EagerZeroedThick VMDK
What is in the bag?
Office 365 - Outlook keeps prompting for password
Vembu BDR Essentials - affordable backup for SMB customers
Exam prep & experience: VMware Certified Advanced Professional 6 - Data Center Virtualization Deployment Exam (VCAP6-DCV Deploy)
Backup from a secondary HPE 3PAR StoreServ array with Veeam Backup & Replication
The one stop solution for backup and DR: Vembu BDR Suite
CloudFlare API v4 and Fail2ban: Fixing the unban action
Windows Network Policy Server (NPS) server won't log failed login attempts
Replace SSL certificates on Citrix NetScaler using the CLI
Bypass stateful firewall on a Sophos XG
Veeam backups fails because of time differences
DOT1X authentication failed on HPE OfficeConnect 1920 switches
HPE Networking expert level certifications
vSphere Distributed Switch health check fails on HPE Comware switches
Demystifying "Interfaces on which heartbeats are not seen"
Azure PowerShell vs. Azure RM PowerShell
Security: If it doesn't hurt, you're doing it wrong!
Unsupported hardware family 'vmx-06'
NetScaler native OTP does not work for users with many group memberships
Meltdown & Spectre: What about Microsoft Exchange?
Meltdown & Spectre: What about HPE Storage and Citrix NetScaler?
The Meltdown/ Spectre shortcut blogpost for Windows, VMware and HPE
My tool chain for 2018
Citrix NetScaler and Exchange: Case-sensitivity of internal and external URLs
Exchange DAG member dies during snapshot creation
Exchange receive connector rejects incoming connections
Stop using your work email for your Microsoft account
Choose one, choose wisely - Office 365 tenant name
Citrix Certified Professional – Networking (CCP-N) exam experience
Hell freezes over - VMware virtualization on Microsoft Azure
How to install Visual Studio Code on Linux Mint 18
How to install PowerShell Core on Linux Mint 18
Continuity vs. change
Notes about 802.1x and MAC authentication
NetScaler ADC - Hidden vServer for HTTPS redirect
Workaround for broken Windows 10 Start Menus with floating desktops
Some thoughts about using Windows Server 2012 R2 instead of Windows 10 for VDI
Data Protector Exchange GRE and IP-less Exchange DAG
Why "Patch Tuesday" is only every four weeks - or never
Roaming of AppData-Local breaks Windows 10 Start Menu
Simplemonitor - Python-based monitoring
Stunnel and Squid on FreeBSD 11
How to set a WiFi connection as metered on Windows 10
Wrong iovDisableIR setting on ProLiant Gen8 might cause a PSOD
Creating console screenshots with Get-ScreenshotFromVM.ps1
Secure your Azure deployment with Palo Alto VM-Series for Azure
vExpert 2017 - My 2 cents about the increasing number of vExperts
Checking the 3PAR Quorum Witness appliance
Single Sign On (SSO) with RemoteApps on Windows Server 2012 (R2)
Horizon View: Server certificate does not match the external url
Tiny PowerShell/ Azure project: Deploy-AzureLab.ps1
Using WP fail2ban with the CloudFlare API to protect your website
The Linux OOM killer strikes again
2016 - How did it go?
Surprise, surprise: Enable/ disable circular logging without downtime
VMware EUC Access Point appliance - Name resolution not working after deployment
Important foot note: Windows 10 Enterprise LTSB 2016 requires a new KMS host key
Fight the chaos: Design your toolbox properly
HPE ProLiant PowerShell SDK
Enable IPv6 SLAAC on HPE OfficeConnect 1920 switches
VCP7-DTM certification beta exam experience
Why I moved from NFS to vSAN... and why it went wrong
Replacing an expired lookup service SSL certificate on a vSphere PSC
HPE Data Protector 9.08 is available
I'm routing on the edge...
Routed Port vs. Switch Virtual Interface (SVI)
HPE 3PAR OS updates that fix VMware VAAI ATS Heartbeat issue
Data Protector: Copy sessions to encrypted devices fail after update to 9.07
Redundancy on the first hop - VRRP
Get-MailboxDatabase doesn't show last backup timestamp
Disable Outlook cached mode for shared mailboxes
Changes to supported .NET Frameworks for Exchange 2013/2016
Exchange 2013 Offline Address Book visible after Exchange 2016 deployment?!
Receive Connector role not selectable in Exchange 2016 CU2
Setting up split DNS using Windows DNS server
Missing hardware status tab in the vSphere Client
Monitoring hardware status with Python and vSphere API calls
How to monitor ESXi host hardware with SNMP
Why VARs should rethink their business model
Python 2.7 for CentOS 6
How to dramatically improve website load times
Lean ITIL Service Operation
Changing DHCP server config on AOS 7
HPE StoreVirtual - Managers and Quorum
HPE StoreVirtual REST API
Dynamic VLAN assignment with AOS 6
Microsoft Windows: Avoiding COM port proliferation
WSUS on Windows 2012 (R2) and KB3159706 - WSUS console fails to connect
First steps with Python and pyVmomi (vSphere SDK for Python)
HPE Hyper Converged 380 - A look under the hood
Hey infrastructure guy, you should learn Python!
Is lean ITSM a myth?
Industrialize your IT - after you have done your homework
End of support for HPE Data Protector 7.0x & 8.0x
Solving problems: A structured approach
HPE Data Protector 9.05: SAN backups failing back to NBDSSL
HPE Data Protector VE Integration/ VMware best practice
Windows recieves wrong DNS server from DHCP after DHCPINFORM
VMware Update Manager reports "error code 99" during scan operation
Kanboard - Kanban made simple
VMware Horizon View space reclamation fails due to activated CBT
Complexity knows only one direction: Getting more complex
Data Protector: Exchange backup failes because of database lock
VMware Horizon View space reclamation fails
Guest customizations fails after upgrade to VMware vSphere 6
ALE OmniSwitch stack does not form due to incompatible licenses
VMware vCenter Storage Monitoring Service & Auto Deploy plug-in failed after upgrade to vSphere 6.0
HPE Data Protector & StoreOnce Catalyst: Single Object per Store Media
HP ProLiant BL460c Gen9: MicroSD card missing during ESXi 5.5 setup
VMware vExpert 2016 - Three times in a row
Considerations when using Microsoft NLB with VMware Horizon View
vCenter Server Appliance as syslog target for Horizon View connection servers
Using Microsoft certreq.exe to generate a certificate signing request (CSR)
Storage vMotion stuck at 100% - cleaning up migration state
Exchange Management Shell (EMS) and new PowerShell releases
An attempt to restore the reputation of IPv6
First hands-on experience with Alcatel-Lucent OmniSwitches
Consider the Veeam Network transport mode if you use NFS datastores
Get progress of 'Shrink Database' task on a Microsoft SQL Server
ESXi 5.5 U3b and later are no longer manageable without vCenter 5.5 U3b
PowerShell ISE on steroids
PowerCLI: Get-LunPathState
Reset the HP iLO Administrator password with hponcfg on ESXi
Screen resolution scaling has stopped working after Horizon View agent update
VMware Horizon View agent update on RDS host fails with "Internal Error 25030"
Using HP StoreOnce as target for Windows Server Backup (WSB)
HP Comware and Windows NLB cluster in multicast mode
A brief introduction into Azure Automation
Certificate-based authentication of Azure Automation accounts
PernixData Architect Software
Outlook license requirements for Exchange features
HP StoreOnce Backup System software version 3.13.0 is available
Error 1325: VBRCatalog is not a valid short file name
HP Comware: Forwarding subnet-directed broadcasts for Wake-on-LAN
Using VCSA as remote syslog - Don't forget the log rotation!
Starting and stopping Azure VMs with Azure PowerShell
Connect an on-premises network to Microsoft Azure with a site-2-site VPN
Automating ESXi configuration for DataCore SANsymphony-V
Use Windows MPIO for DataCore backend storage connections
First experience: Nexsan E-Series
Chicken-and-egg problem: 3PAR VSP 4.3 MU1 & 3PAR OS 3.2.1 MU3
Microsoft Exchange 2013 shows blank ECP & OWA after changes to SSL certificates
DataCore mirrored virtual disks full recovery fails repeatedly
Windows guest customization fails after cloning a VM
FVP Freedom: Get Pernix'd for free
Juniper launches Design Certification Track
HP StoreOnce: Avoid special characters in NAS share description
VCP6-DCV Delta Beta exam experience
HP Service Pack for ProLiant 2015.04
VMware publishes patch for ESXi 6.0 CBT bug (KB2114076)
Selected as PernixPro
Safe (or safer) than backup to tape: HP StoreOnce
HP offers 1TB StoreOnce VSA for free
Is Nutanix the perfect fit for SMBs?
Top vBlog 2015: vcloudnine.de placed on #133
Tiering? Caching? Why it's important to differ between them.
Logon problems after demoting a branch office Domain Controller
What to consider when implementing HP 3PAR with iSCSI in VMware environments
Update OS or reinstall DataCore SANsymphony-V Storage Server
My first impressions about PernixData FVP 2.5
vCenter Server Appliance: Troubleshooting full database partition
Top vBlog 2015 Contest has started
VMware vExpert 2015
Stunnel refuses to work after update
How to shrink thin-provisioned disks
The beginning of a deep friendship: Me & PernixData FVP 2.0
Publishing Outlook Web Access with Microsoft Web Application Proxy (WAP)
Shady upgrade path for NetApp ONTAP 7-Mode to cDOT
Load Balancing inbound SMTP connection with HAProxy
Load Balancing Microsoft Exchange 2013 with HAProxy
vSphere Lab Storage: Synology DS414slim Part 1 - Unboxing and initial setup
vSphere Lab Storage: Synology DS414slim Part 2 - Networking
vSphere Lab Storage: Synology DS414slim Part 3 - Storage
vSphere Lab Storage: Synology DS414slim Part 4 - VAAI-NAS Plugin
How to migrate from VMware vCOps to vROps - Part 1
How to migrate from VMware vCOps to vROps - Part 2
How to migrate from VMware vCOps to vROps – Part 3
End-of-year review 2014
VCP5-DCV Delta recertification exam extended
HP Data Protector: JSONizer error when restoring from StoreOnce
HP Data Protector: Can't delete old DCBF directories
HP Discover: New 3PAR StoreServ models
VM deployment fails with "Authenticity of the host's SSL certificate is not verified"
Replacing SSL certificates for vRealize Orchestrator Appliance
VCP5-DCV Delta recertification exam
Add a new version of HP Agentless Management Service to a customized ESXi 5.5.0 ISO
VMware ESXi 5.5.0 U2 patches break Citrix NetScaler network connectivity
Juniper publishes vMX
HP publishes HP 3PAR OS 3.2.1 MU1 with Thin Deduplication
Resurrected from the dead: Why it is sometimes better to repair vCOps
Exam experience JNCIA-Junos
STOP c00002e2 after changing SCSI Controller to PVSCSI
VMware disables inter VM Transparent Page Sharing (TPS) for security reasons
My lab network design
HP 3PAR Peer Persistence for Microsoft Windows Servers and Hyper-V
Performance issues on new HW
VMware vCenter: Host state 'not responding' flapping
VMware vSphere Metro Storage Cluster with HP 3PAR Peer Persistence – Part II
Trouble due to changed vDS default security policy
HP StoreOnce Enterprise Manager v1.3 installation fails on non-English OS
VMware vSphere Metro Storage Cluster with HP 3PAR Peer Persistence - Part I
Data Protector: Exchange 2010 database recovery from copy session fails
VMware jumps on the fast moving hyper-converged train
New HP 3PAR StoreServ AFA, VMware VVols and some thoughts
DataCore In SANsymphony-V 10: Potential for data corruption
Creating an HP IRF stack with HP 5820-24XG-SFP+ Switches
Juniper SRX: Using CoS to manage bandwidth
Memory management: VMware ESXi vs. Microsoft Hyper-V
Organize your work with Kanban
HP Service Pack for ProLiant 2014.06
Install VMware Tools from VMware repository
Users on Exchange 2013 can't open public folders or shared mailboxes on an Exchange 2007/ 2010
Importance of client-side proxy settings in Exchange 2013 environments
Active Directory property homeMDB is not writeable on recipient
Exchange 2013: Event ID 2937 MSExchange ADAccess after public folder migration
Sophos UTM Home Edition license expired
Automating updates during MDT 2013 Lite-Touch deployments
Patch available: VMware vSphere 5.5 U1 NFS APD bug
VM shows alarm - but no alarm triggered
TeamViewer Connection with Royal TS
Configuring HP StoreOnce VSA and HP Data Protector for HP StoreOnce Catalyst
Conflicting information: Setting iops option for VMW_PSP_RR for HP 3PAR StoreServ on ESXi
Royal TS - Remote connection management for Windows
Add custom SATP claimrule for HP 3PAR to VMware ESXi
Some thoughts about HP 3PAR Adaptive Optimization
Event ID 4625 - Failure Reason: Domain sid inconsistent
Power on HP ProLiant servers with iLO, SSH & Plink
Protection of virtual machines with HP StoreOnce VSA & Veeam Backup & Replication v7
Deploying HP StoreOnce VSA with HP Data Protector - Part III
Deploying HP StoreOnce VSA with HP Data Protector - Part I
Deploying HP StoreOnce VSA with HP Data Protector - Part II
Deploying HP StoreVirtual VSA - Part I
Deploying HP StoreVirtual VSA – Part II
Replace HP iLO security certificates
VMware ESXi 5.5 host doesn't mount VMFS 5 datastore
IaaS by VMware: VMware vCloud Hybrid Service
Problem analysis with Kepner-Tregoe
DataCore announces SANsymphony-V10
IT industrialization: From manufactory to factory
Trouble with Broadcom NetXtreme II and VMware ESXi
HP StoreVirtual VSA - An introduction
vExpert 2014 benefits
Configuration management with Juniper Junos
HP StoreOnce VSA - An introduction
Pluralsight: Free subscription for tech VIPs
VMware vExpert 2014
Homelabs: It's evolution, baby
Support of HP OEM VMware bundles on non HP Hardware
Enable CDP on VMware vSS
Launch vCenter (Web) Client in localized language
HP Data Protector: Backup of DMZ servers
Juniper Firefly Perimeter
Load VMware PowerCLI snap-in automatically in PowerShell ISE
Simulate ONTAP 8 - An introduction
Simulate ONTAP 8: Setup CIFS
HP VSR1000: How to configure a IPsec tunnel
VMware VCP certification has now an expiration date
Change network adapter type with PowerCLI
Useful stuff about Nutanix
How to deploy Cisco CSR1000V & HP VSR1000 Virtual Service Router
Virtual Service Router - An introduction
HP 4 Gb Fibre Channel Pass-Thru Module for c-Class BladeSystem & 8 Gb SFP+ transceiver
HP Service Pack for ProLiant 2014.02
DataCore SANsymphony-V 9.0 PSP4 Update 3 – Update recommended
Fibre Channel: ISL, ISL trunking & FSPF
Windows Server 2012 Cluster with VMware vSphere 5.1/ 5.5
Changes regarding HP ProLiant Server firmware access
VMware VAAI support for HP P2000 G3 & HP MSA 2040
Flooded network due HP Networking Switches & Windows NLB
DataCore SANsymphony-V 9.0 PSP4 Update 2 - Update recommended
Deploying Windows Server VMs with Microsoft Deployment Toolkit 2013 – Part III
Deploying Windows Server VMs with Microsoft Deployment Toolkit 2013 - Part II
Deploying Windows Server VMs with Microsoft Deployment Toolkit 2013 - Intro
Deploying Windows Server VMs with Microsoft Deployment Toolkit 2013 - Part I
vStorage API for Array Integration & vSphere Essentials Plus
Enable VMware Fault Tolerance in nested enviroments
Regenerating expired vCenter SSL certificates
Reducing the friction: On-site installation
Backup DataCore SANsymphony-V config using PowerShell
My most frequently used PowerCLI One-liner
Yet another blog...