When you try to add a vCenter Server or a standalone host with a different time zone, the operation may fail with an error informing that time difference between Veeam ONE Monitor Server and the remote host is too large.
To resolve the issue, follow the next steps:
Stop Veeam ONE Monitor and Veeam ONE Reporter services.
Open the registry and navigate to the HKEY_LOCAL_MACHINE\Software\Veeam\Veeam ONE Monitor\Service registry key.
Create a new entry with the following parameters or modify if exists:
Name: MaxTimeDiff Type: DWORD Value: the value that can cover the time difference in seconds
Start Veeam ONE Monitor and Veeam ONE Reporter services.