Error (25270) No MAC addresses were available to allocate to network adapter

You receive the following error in SCVMM when assigning a vNIC to a logical switch on a host.

Error (25270)
No MAC addresses were available to allocate to network adapter (<name here>).

Recommended Action
Allocate additional MAC address pools and retry the operation.

Obligatory graphic:

MACerror1

I checked the pool using Get-SCStaticIPAddressPool and sure enough there are IP’s still available:

MACerror2

What do you do? If you manually try to assign a MAC, it bombs out with the error 25270. So! Recreate the vNIC to fix the issue.

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