How to Fix Fix Error 0x8007003F — Network Request Not Accepted on Windows
Getting error 0x8007003F during network operations? Network request not accepted by server? Remote server rejecting connection? Network command returning request denied? File sharing access request rejected? Fix this network request error.
Symptoms
You might be experiencing this problem if you notice:
- •Network file operations fail with 0x8007003F
- •Connecting to network share returns request not accepted
- •Remote server denies the connection attempt
- •SMB session setup rejected by target server
- •Network printer connection returning this error
- •VPN tunnel established but resource access denied with this code
Common Causes
- ⚠Server has reached maximum connection limit
- ⚠SMB authentication version mismatch (SMB1 vs SMB2/3)
- ⚠Server firewall blocking incoming connection on specific port
- ⚠NTLM or Kerberos authentication failing
- ⚠Server-side access control list (ACL) denying access
- ⚠Network security policy rejecting the request type
Solutions
Solution 1: Fix Authentication and SMB Version
- 1Check SMB version compatibility:
- 2PowerShell as Admin on client:
- 3Get-SmbConnection
- 4Note the dialect (2.0, 2.1, 3.0, 3.1.1)
- 5Ensure both client and server support same version:
- 6Get-SmbServerConfiguration | Select EnableSMB1Protocol, EnableSMB2Protocol
- 7If server requires SMB1 (legacy):
- 8Not recommended — security risk
- 9Enable only if necessary:
- 10Enable-WindowsOptionalFeature -Online -FeatureName "SMB1Protocol-Client"
- 11Fix authentication:
- 12Ensure credentials are correct:
- 13CMD: net use \\server\share /delete (clear old credentials)
- 14CMD: net use \\server\share /user:domain\username
- 15Enter password when prompted
Solution 2: Fix Server Connection Limits and Firewall
- 1Server may have reached connection limit:
- 2Windows default: 16,777,216 SMB sessions
- 3But some NAS devices or older servers have lower limits
- 4Check on server: Get-SmbServerConfiguration | Select MaxSessionPerConnection
- 5Wait a few minutes and retry — sessions may time out
- 6Check firewall on both client and server:
- 7Client: netsh advfirewall firewall show rule name="File and Printer Sharing"
- 8Ensure it's enabled for your network profile (Domain/Private)
- 9Server: ensure port 445 (SMB) is open:
- 10Test: Test-NetConnection -ComputerName server -Port 445
- 11If blocked: add firewall rule or contact admin
- 12For VPN connections:
- 13Split tunnel may not route SMB traffic through VPN
- 14Check VPN configuration for network routes
Solution 3: Fix Network Security Policies
- 1Security policies may be rejecting the request:
- 2Check Local Security Policy:
- 3secpol.msc → Local Policies → Security Options
- 4"Network access: Restrict anonymous access to Named Pipes and Shares" → check
- 5"Network access: Sharing and security model for local accounts"
- 6Should be: "Classic - local users authenticate as themselves"
- 7Check NTLMv2:
- 8"Network security: LAN Manager authentication level"
- 9Should be: "Send NTLMv2 response only"
- 10For Kerberos issues:
- 11Ensure system time is within 5 minutes of domain controller
- 12CMD: w32tm /resync
- 13For persistent issues:
- 14Clear all cached network credentials:
- 15CMD: cmdkey /list (view all)
- 16CMD: cmdkey /delete:target (remove problematic ones)
- 17Restart the Workstation service:
- 18net stop workstation && net start workstation
FIXES THIS IN 5 MINUTES
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