115 solutions found, page 5 of 6
0XC00002FD Kerberos auth fails when the KDC doesn't support the encryption type requested by the client. Classic cause: old domain controller or misconfigured re...
0X00000774 This error means Windows can't find a domain controller. Usually it's a DNS issue, a cached bad password, or a firewall blocking traffic....
0X0000056D This error means Windows hit a hard limit on security identifiers per access token. The quickest fix is trimming group memberships in AD or local grou...
0X00002554 This error means your DNS name has illegal characters. Usually underscores or bad hostnames. Here's how to fix it in three common scenarios....
0X000013B2 Windows Server fails to find a cluster node. The fix restores the node's registry and cluster database. Works for Windows Server 2016, 2019, 2022....
0X000035ED IPsec negotiation timed out — usually a firewall or config mismatch. Here's how to fix it without wasting time....
0X80090345 Kerberos delegation issue when trying to access a resource that requires double-hop authentication. Usually a server config problem, not your PC....
0X000006D2 This RPC binding auth error usually hits when Windows updates break the RPC service or when a domain controller's clock is off. Here's how to fix it f...
0X000006D5 This error pops up when Windows can't verify your login credentials during remote connections. It's a security context mismatch, not a hardware proble...
0X000025F5 Shows up when a client can't reach the AD DS DNS server during domain join or login. Usually a DNS misconfig or firewall block....
0X000021C7 Duplicate SPNs in Active Directory cause this error when a service fails to authenticate. The culprit is almost always a leftover or misconfigured SPN...
0X80090326 This error shows up when Kerberos or NTLM authentication gets mangled. Common in VPN or proxy setups. Fix is usually SPN or time sync....
0XC0020032 This error means an RPC call failed because the authentication identity is invalid. The quick fix is to reset the SPN or clear the credential cache....
0XC00000DF This error pops up when Windows can't find the domain you're trying to join. It's usually a DNS or network issue, not a broken domain controller....
0XC000040B This Kerberos delegation error stops cross-realm authentication cold. Start with the 30-second fix, then escalate if needed....
0X80091011 This error means Windows couldn't decode a cryptographically signed message because the data stream was incomplete. The fix is usually clearing corrup...
0X80090341 This error pops up when Kerberos can't get a referral ticket between domains. It's common after domain migrations or with broken trust....
0X00000575 Mutual auth failure on RDP or NTLM? Here's how to kill that error fast—from a 30-second time sync check to a full Kerberos ticket nuke....
0X000020F4 This error pops up when AD replication fails between domain controllers. It's usually a DNS or connectivity problem, not a directory corruption issue....
0XC0000905 This error means Windows is rejecting access to a network resource because it needs forms-based authentication, which Windows itself doesn't support. ...