Xenserver: New Virtual devices and changes on old virtual devices not reflected in opmanager

Xenserver: New Virtual devices and changes on old virtual devices not reflected in opmanager

I've configured a Xenserver Pool with some hosts. Opmanager initaly detected all config very well, but now, every time i change memory size, disk, cpu on already detected virtual devices, opmanager not reflect changes. I try to rediscover all host and virtual devices. If I create a new VM in my xenserver is not dectected by opmanager.

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