ispconfig + LDAP + egroupware

[blackflag]

Hello all,
I want to know if there is a possibility to create LDAP User accounts in ispconfig?
Im asking cause I have egroupware installed and in the moment I can only use egroupware when I create email user in ispconfig and egroupware with same credentials.
Egroupware supports LDAP. How is it with ispconfig?
Or can someone tell me how I can create email users in ispconfig or egroupware only one time.
In the moment it is not a really good solution to create users twice.

tia
stefan