Mailbox Administration issues

[Imran Aziz]

I was able to sort out the issue with the Case sensitivity, but the
username with a dot sign is still not being allowed.

I have added two entries to the imapd.conf file and restarted the server.

unixhierarchysep: yes
lmtp_downcase_rcpt: yes

when I try to create the account in cyradm using the command

createmailbox user.gary.hogman

I get this error createmailbox: Permission denied

Can anyone please suggest how to sort out this mailbox creation issue.
I want to be able to create mailboxes using a dot sign to separate
their first and last name.

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