Event ID: 12818 User / group relation error. 

1.Group name contains invalid characters
Phenomenon

The following event is output to Event Viewer.

Log LevelMessage
warn

[Overview]
User / group relation error.

[Detail]
Please, remove this characters (";? | `) from group name.(User.sAMAccountName: (user name): Group.DN: (group base DN))

Description

Group name contains invalid characters.

Support

Remove the following characters from the group name.

  • Double quotation marks (")
  • Semicolons (;)
  • Question marks (?)
  • Vertical bars (|)
  • Grave accents (`)
2.Group to which user belongs does not exist
Phenomenon

The following event is output to Event Viewer.

Log LevelMessage
warn

[Overview]
User / group relation error.

[Detail]
[LDAP USER]
Could not have user belonging to group. ((user name ): (group base DN))

Description

Group to which user belongs does not exist.

Support

Check whether the group to which the user belongs is in the base_dn range.