Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application !!exclusive!! (2026)
This is a common and critical issue when deploying Veeam Backup & Replication (VBR). The error indicates a port conflict on TCP port 443.
The Fix: Use the command netsh http show servicestate to see which registered endpoints are active. 3. Can You Change the Port in Veeam? This is a common and critical issue when
Major Issues After Upgrading to Veeam V13: Port 443 Conflict IIS Manager (InetMgr
to change its own internal web service port during installation, you must move the application: For Hyper-V: Hyper-V Settings Replication Configuration Change the port from to another available port (e.g., Update your individual VM Replication settings to match. IIS Manager (InetMgr.exe) , right-click the conflicting site, and select Edit Bindings Change the HTTPS port from IIS Manager (InetMgr.exe)
IIS (Internet Information Services): Default web sites or other web applications hosted on the same server. Step 2: Resolve the Conflict
2. Microsoft Exchange Server
If Veeam is installed on an Exchange Server (not recommended but sometimes done in small environments), Exchange’s front-end services (Outlook Web App, ECP, ActiveSync) listen on port 443.
This is a common and critical issue when deploying Veeam Backup & Replication (VBR). The error indicates a port conflict on TCP port 443.
The Fix: Use the command netsh http show servicestate to see which registered endpoints are active. 3. Can You Change the Port in Veeam?
Major Issues After Upgrading to Veeam V13: Port 443 Conflict
to change its own internal web service port during installation, you must move the application: For Hyper-V: Hyper-V Settings Replication Configuration Change the port from to another available port (e.g., Update your individual VM Replication settings to match. IIS Manager (InetMgr.exe) , right-click the conflicting site, and select Edit Bindings Change the HTTPS port from
IIS (Internet Information Services): Default web sites or other web applications hosted on the same server. Step 2: Resolve the Conflict
2. Microsoft Exchange Server
If Veeam is installed on an Exchange Server (not recommended but sometimes done in small environments), Exchange’s front-end services (Outlook Web App, ECP, ActiveSync) listen on port 443.