The CellServDB key is an alternative to the CellServDB file that can be used either to supplement or override its contents. This registry entry is meant to provide organizations that centrally manage their client configurations using Active Directory Group Policy a means of updating records for individual cells or servers without pushing out a new file.

At the present time the CellServDB key contains no values; only subkeys. Each subkey is the name of a Cell. For example, grand.central.org.

Support for registry CellServDB configuration was added in 1.5.60.