Web servers installed by third-party management tools often run silently in the background.
netsh http delete urlacl url=https://+:443/
Knowing that port 443 is used by many services makes it easier to guess where the conflict might come from. However, you should never guess; you must identify the exact process. Common offenders include: Web servers installed by third-party management tools often
else Write-Host "Port $port is free." -ForegroundColor Green
If Microsoft IIS is running on the backup server, it may be holding a broad binding across all IP addresses on port 443. Open the . Common offenders include: else Write-Host "Port $port is
As organizations transition to , many administrators encounter a critical installation or upgrade error: "Required port 443 for Veeam Backup & Replication is occupied by another application" .
HKEY_LOCAL_MACHINE\SOFTWARE\Veeam\Veeam Backup Enterprise Manager Use code with caution. For production environments
Stop-Website 'Default Web Site' Set-ItemProperty 'IIS:\Sites\Default Web Site' -Name ServerAutoStart -Value $false
If you installed VMware Workstation or vCenter components on the same Windows Server as Veeam, VMware will hijack port 443 for its shared virtual machines service.
: Veeam itself "does not expect the backup server to be shared with 3rd party apps". For production environments, always install Veeam Backup & Replication on a server that does not run IIS, Skype, or any other application that might need port 443.