we have a PKI that allows encrypting messages in mail exchange server 2003.

only a well-defined group of accounts called "G" needs to encrypt these messages.

we created a test account "test" that has been assigned to this gourpe but no certificate has been generated for this account.
the problem is that an account "A" in the group "G" sent a message to all members of the group "G" at once (including the account "test" of course),
and because "test "has no certifcate an error message was displayed in the letter box outlook accounts of other members of the group" G "
the message is as follows:

outlook does not find the numeric identifier for this account "test"

to solve the probelme we deleted the account "A" form AD! but the probelme persists,
now I wonder if when we will create an other account with the same noun and we generate a certificates
for it that will solve the probelme?
or you have an other propossions?

The account that was deleted is probably still present in Offline Address Book. You should first download updated version of OAB. Also, if you deleted an account recreating one with same name will not help. you can, however, perform a restore (depending on version of AD DS you're running).

thanks for the replay,

we can not make a restore to AD server, many changes were made.

but how can I check if the account still in the Office Adress book?