Required Port 443 For Veeam Backup & Replication Is Occupied By Another Application [verified] Site

Communicates securely with AWS, Microsoft Azure, Google Cloud, and on-premises S3-compatible storage.

Because Veeam v13 requires 443 and generally does not support changing this port for its own web services, you must move the application to a different port.

Sort by the column and find the number you identified in the previous step. This will tell you exactly which .exe is hogging the port. 2. Common Culprits and How to Move Them This will tell you exactly which

If the Veeam server is intended to be a dedicated backup appliance and IIS or other web services were installed accidentally or are not needed:

Open a browser and test the API connectivity to ensure functionality. She considered running Veeam on port 8443 internally,

She considered running Veeam on port 8443 internally, then setting up an IIS ARR (Application Request Routing) reverse proxy on port 443 that forwarded traffic. Elegant in theory. In practice, Veeam’s API hard-codes redirect URLs in its authentication handshake. The moment the proxy forwarded a request, Veeam would generate a callback URL with :8443 , the browser would throw a CORS error, and backup jobs would fail with cryptic "token mismatch" errors.

If you absolutely cannot free up port 443 on the host operating system, you can instruct Veeam to install or run on a different port during or after installation. During Installation In most cases

Port 443 conflicts are common but easy to fix once you know what’s listening. In most cases, it’s a harmless local service like IIS or a chat app. By identifying the PID and stopping or reconfiguring the offender, you’ll get Veeam Backup & Replication installed without a hitch.

She leaned back. Her phone buzzed. A calendar invite from Raj: "Meeting: Formalize NIC segregation policy – Next Tuesday."

Check Task Manager (Details tab) to see which application corresponds to that PID. 2. Common Conflicting Services Hyper-V Replication

In many cases, port 443 is hardcoded in the installer, meaning you cannot simply choose a different port during the setup process. Step 1: Identify the Conflicting Application