About LDAP Global Settings

Define global settings for CommonLDAP, including:

LDAP Authentication Cache TTL: Deep Edge supports two kinds:
- Fixed TTL (first hit): Default TTL is 2 hours
- Last active (last hit): No default
LDAP Sync Interval-Sync every (Hours 1-48): Deep Edge auto-synchronizes user-group mapping from LDAP server periodically. (Default is 24 hours.)

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