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STATUS_DS_GC_NOT_AVAILABLE
No reachable Global Catalog was available
A Global Catalog contains forest-wide searchable data and partial replicas from other domains. This status means the operation required that GC view but could not contact a server that could provide it.
The failure is usually environmental rather than caused by the target object alone: site placement, DNS, firewall rules, replication, or a DC that is not actually configured as a GC can all produce the same symptom.
What to inspect
- Verify the client site and the list of DCs advertising the GC role.
- Test binding to the GC namespace and compare it with ordinary domain LDAP binding.
- Check whether the affected operation requires universal group membership, forest-wide name lookup, or cross-domain search.
References
- Microsoft: Global Catalog
- Microsoft: binding to the Global Catalog
- Microsoft: planning Global Catalog placement
- Microsoft Open Specifications: NTSTATUS values
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