Satellite 5: How to add file to configuration channel owned by a user/group that includes a dot?

Hi

As subject says, I am using Satellite 5.7, created several configuration channels, they work fine. However a particular channel has to create files and the user owner of those files has a dot in the username/group name. Satellite is not allowing me to create the file, it throws this error:

User must be a valid Linux user name or user id, of 32 characters or less.
Group must be a valid Linux group name or group id, of 32 characters or less.

However the user is completely valid, it already exists in several RHEL5/6/7 systems and it works fine. Any workaround for this situation (other than changing the username/group) is appreciated.

Thanks!!