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STATUS_CONNECTION_COUNT_LIMIT
STATUS_CONNECTION_COUNT_LIMIT explicitly points to a per-account concurrency limit. It differs from a general server-resource shortage: the server can be reachable and healthy while refusing another connection for the account whose quota has been exhausted.
How to narrow it down
Identify the principal used by the client and count its live connections across all shares and applications. Service accounts are common sources of this condition because multiple processes or machines can reuse the same identity. A connection pool that is correct for one user may violate an account quota when scaled out.
Fix the ownership and lifecycle of connections before simply increasing a limit. Leaked or duplicate connections will otherwise consume the additional capacity and make failures less predictable.
Evidence that matters
- Correlate the limit with the account, not only the client machine.
- Find connection leaks, duplicate workers and persistent background sessions.
- Evaluate whether the workload should pool, throttle or use separate approved identities.
References
- Microsoft Open Specifications: NTSTATUS reference
- Microsoft: SMB overview
- Microsoft: Get-SmbConnection
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