Migration in Plesk cannot be started: Panel Migrator failed to install RPC Agent

Symptoms

• Migration to Plesk cannot be started:

  PLESK_ERROR: [ERROR] Failed to perform action: Check connections
  Cause: Error while checking connection settings: 'Panel Migrator failed to install RPC Agent to '203.0.113.2' server.
  RPC Agent is required for communication between current server and '203.0.113.2' server

  ---

  CONFIG_TEXT: Connection to the host is not available or the migration agent is not running on the source host.

• Migration is stuck on the step "Retrieving Information from Host".

• Migration hangs with the following message in Plesk UI:

  CONFIG_TEXT: Check that specified source servers accounts are built-in Windows administrators

Cause

RPC agent that is required for migration is missing or it is run under a non-administrator user on a source server.

Resolution

1. Log in to Plesk on the target server.

2. Go to Tools & Settings > Migration & Transfer Manager > Start a New Migration.

3. In the section Setup, select Manual migration type and download RPC Agent installation package using the link from that screen:
   

4. Connect to the source server via RDP and upload the file downloaded in step 3 run-panel-migrator-rpc-agent.exe to any location, e.g. C:\plesk_migrator.

5. Run the downloaded .exe file as Administrator on the source server. For that, right click on the run-panel-migrator-rpc-agent.exe file and choose Run as administrator:
   

   Note: Do not close opened terminal window.

6. Restart or continue the migration on a target server.

Additional Information

Migration fails: Panel Migrator failed to connect to RPC Agent