N1 Provisioning Server 3.0 Update 1, Blades Edition, Release Notes

Changing Server Group Names

When changing the name of a server group, the number of servers in the group must be 25 or less. If you have more than 25 servers in a group, remove servers from the group to reduce the number of servers to 25 or less, then add them back to the group after the name change process completes. (4924841)