Hello
Thank you for your question and reaching out. I can understand you are having issues related to VEEAM
When adding a Hyper-V server to Veaam Backup & Replication, the account assigned must comply with UAC remote restrictions. Specifically, the account must be either of the following:
A domain account that is a member of the Local Administrators group.
The built-in account named Administrator.
Additionally , I would suggest you to contact to VEEAM support to get further help for this issue.
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