When starting the migration, the following error is shown in Plesk:
Error: RPC agent on source server '203.0.113.2' is running not under built-in administrator account.
When starting RPC agent on source server manually, the following warning appears:
[WARNING] RPC agent was started by not built-in administrator. Despite that it is ready to accept connections, Plesk Migrator could be unable to interact with it. You should ignore this warning is case of migration from Helm 3: Plesk Migrator will be able to interact with RPC agent, started by Helm Administrator account.
Migration is started not under "Administrator" account
Migration is started not under the built-in Administrator account. In this case, Plesk Migrator is unable to perform the different operation in the source server because of lack of permissions.
Start migration under Administrator account.
More information about migration can be found here .