IMAP and POP Proxy checkbox greyed out

[ThorGoLucky]

Hi, in the Zimbra Administration interface --> Configuration --> Domains --> my server --> Services tab, the "IMAP and POP Proxy" checkbox is unchecked and it won't let me check it. I have used IMAP on this server in the past but I guess one of the updates killed it. Is there now some prerequisite to enabling IMAP? Thanks.

Under the IMAP tab, I have all of the following checkboxes checked:
[X] Enable IMAP service
[X] Enable SSL for IMAP service
[X] Enable clear text login

Version 5.0.10_GA_2638.RHEL4_64.NETWORK

[phoenix]

You can't enable the proxy on a single server install.

[ThorGoLucky]

Oh thanks, I misunderstood.