[CentOS] systemctl enable httpd failure

Thu Apr 28 12:29:51 UTC 2016
Michael H <michael at wemoto.com>

Hi List,

[root at mail1 ~]# systemctl enable httpd
Failed to execute operation: Invalid argument

I can disable and re-enable other services without issue, I'm also
seeing the same error when I run

[root at mail1 ~]# systemctl enable mailman
Failed to execute operation: Invalid argument

Any suggestions?

Michael