virtualcenter


Our IT journal

Thin ISCSI LUN on Synology & VMware ESXi – How to enable Space Reclamation

We found a couple of LUNs with data on them that didn’t have space reclamation enabled: These LUNs were mapped to ESXi’s hosts, and were filling up and not doing any type of reclamation: You can also check this setting via ESXi ssh, and run: esxcli storage core device vaai status get It will return something like this: We need … Read More


Delete an orphaned Calendar entry on Google Workspace

Sometimes we get requests that people that has left the company, leaves a recurring event (in this case, a birthday entry), that invites everyone at the company and nobody is left as an owner. The quickest way of getting the calendar that owns the entry, is to get the group email of the calendar invite: Open an event, and click … Read More


Deleting an email on all mailboxes in 365

This process is designed to delete emails delivered to your own tenant in Microsoft 365.   Grant yourself the eDiscovery role: Go to https://purview.microsoft.com/ Edit eDiscovery Manager and add your user.     Open up Powershell:   Import-Module ExchangeOnlineManagement Connect-IPPSSession -UserPrincipalName [email protected]   Create a Compliance search (check the query) New-ComplianceSearch -name “Search22” -ExchangeLocation all -ContentMatchQuery ‘subject:”Subject of the email … Read More


Enabling TPM 2.0 on VMware ESXi 8 on AMD Dell servers

Enter the BIOS via F2 at boot and go into System Setup/System Security: Enable TPM Security:   (Note: Firmware won’t be displayed until the server reboots)   Click on TPM Advanced Settings Select the following options: Apply Secure Boot enabled:     Apply settings and reboot the server You will have to disconnect and re-connect the host:   After that, … Read More


Upgrade ESXi host via SSH with Offline Update

Put server on maintenance mode Upload ZIP file to Datastore   List profiles [root@ESXI03] esxcli software sources profile list -d /vmfs/volumes/VMFS-DS/ESXiUpdate/VMware-VMvisor-Installer-8.0.0 .update02-23305546.x86_64-Dell_Customized-A06.zip Name Vendor Acceptance Level Creation Time Modification Time ————————- ——— —————- ——————- ——————- DEL-ESXi_802.23305546-A06 Dell Inc. PartnerSupported 2024-03-08T16:47:19 2024-03-08T16:47:19   Copy the name of the profile [root@ESXI03] esxcli software profile update -d /vmfs/volumes/VMFS-DS/ESXiUpdate/VMware-VMvisor-Installer-8.0.0.updat e02-23305546.x86_64-Dell_Customized-A06.zip -p DEL-ESXi_802.23305546-A06 Update Result … Read More


VMware vCenter 8 and VRMS Site Recovery Manager 9 – Error downloading plug-in / certificate doesn’t match

We recently deployed vCenter 8 along VRMS (Site Recovery Manager). While the deployment went well, we encountered this issue:   Error downloading plug-in. Make sure that the URL is reachable and the registered thumbprint is correct. Certificate for <hostname.LOCAL> doesn’t match any of the subject alternative names: [hostname, 10.0.0.50] While the error ended up being quite self-explanatory, we had to … Read More


Unifi Controller – Can’t send emails via unauthenticated SMTP

Using a SMTP server with unauthenticated port 25:   We need to edit this file  /usr/lib/unifi/data/system.properties Add the following at the bottom: smtp.checkserveridentity=false smtp.starttls_enabled=false   Save changes and reboot the server


vSphere: Best practices for multi pathing devices when using round robin

On a production environment, we have a new Dell Powervault ME5024 and several Synology boxes, running on Ethernet 10GB. The ESXi cluster has 2 10 GB NICs per host, the Powervault has 8 10GB NICs (4 x 2 on failover) and each Synology has 2 10 GB NICs. The IT manager from this client configured VMware with iSCSI on all … Read More


vCenter – VMware Appliance Management ‘User password expired’

After 90 days, the password for the 5480 port expires and you need to change it. To do this, we will need console access to the VCSA. Authenticate using the expired root password at the VM prompt, and choose Troubleshooting Mode Options: Enable SSH Use a SSH session to authenticate with the vCenter Once authenticated, do: shell If running this … Read More


GPT PMBR Size Mismatch will be corrected by w(rite)

On a disk I wanted to expand I had the error GPT PMBR Size Mismatch will be corrected by w(rite) Do parted:   parted -l   Type fix and press enter