Is 6.7 U1 supported with Avamar 7.5.1?
Yes. vSphere 6.7 and 6.7U1 support was added in 7.5.1.
You can find the compatibility guide for 7.5 here:
Under Hypervisor, select VMware and hit "Generate Report".
is Avamar 7.5.1 compatibility with vCenter 6.7 u2c ? Please let me know.
18.1 and higher.