Event ID - 1023

Event Id1023
SourceSBCore
DescriptionThe license store for the client access licenses is not valid. Only the minimum number of client access licenses will be available until a valid license store is restored. For more information, see Help in the Licensing snap-in.
Event InformationAccording to Microsoft:
CAUSE:
This issue may occur if the Windows Small Business Server license store has been reset to the default value of five CALs.
RESOLUTION:
Method 1:
Use the Restore License Wizard to restore your CALs from a valid license store.
Method 2:
Use the Backup or Restore Wizard to restore your CALs from a system backup.
Method 3:
Use the Add License Wizard to re-issue CALs.
Reference LinksThe number of client access licenses may be reset to five in Windows Small Business Server 2003

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