Internal Server error: The service is temporary not available

Cannot connect to the LDAP service.
The following steps can help to solve this problem:

  • Check if enough hard disk space and free RAM is available on this server or free some resources
  • Restart the LDAP service on the domain controller master either via “service slapd restart” on command line or with the UMC module “System services”
  • Install the latest software updates

can you please send us more info how did you get this error message
The syslog file would help us