PGP Key without Subkey
my company uses several public keys sent by External customers to encrypt customer data
Some new starters in the team have the standard PGP Desktop version 8.1 installed and one of the customer keys (only one out of is not working on the new installations
On examination the key that is not working is an RSA Public Key without a Subkey (all other keys have a subkey)
This key is working on 2 existing team members computers which have either bespoke versions of PGP Desktop (we do not know what was done)
My question is how can this key work without a Subkey ?
and is there anything that can be done to the stanard version to make this key work ?
Appreciate any help I can get