| Event Id | 403 |
| Source | SNA Server |
| Description | Single Sign-On request for domain\user failed - Could not locate a host account cache for host domain Host Security Domain Name. |
| Event Information | According to Microsoft: This problem occurs as follows: 1. The computer where the MDB is running is taken off-line (or becomes unavailable). 2. Account look-ups continue to work using the SDB. 3. With the MDB off-line, the SDB computer is restarted. 4. The backup SNA Host Account Cache Service indicates the SDB is available again to service account look-up requests. 5. While the MDB is still off-line, any additional account look-ups to the SDB fail. Before an SDB can service any account look-up requests, the following steps must complete: 1. The backup SNA Host Account Cache Service contacts the primary SNA HAC Service where the MDB resides. If the SDB cannot locate the MDB information (event 1345), then the remaining steps do not complete, and the result is that all SSO look-ups fail. 2. The local SDB synchronizes with the MDB. 3. The SDB is initialized. SSO account look-ups would continue to succeed in environments that contain other SDBs that have not been restarted while the MDB is off-line. |
| Reference Links | SDB Cannot Service Look-up Requests Before Required Steps Complete |
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