| Event Id | 668 |
| Source | SNA Host Security |
| Description | Password Change DLL -- The message queue file is full. |
| Event Information | According to Microsoft: After you apply the update, the password change DLL writes all password change notifications it intercepts into a memory queue. After the password change notification is written to the memory queue, the dispatch thread of password change DLL dequeues the first password change notification and immediately attempts to contact the SNAPMP service to propagate it. If the SNAPMP service cannot be contacted, the password change DLL attempts to send the password change notification stored in the memory buffer a total of five times. The initial attempt, is then followed by up to four retries. The password change DLL stops retrying if the total retry time exceeds five minutes. The actual interval between retries may vary depending on specific network situations. In addition, the password change notifications are written to an encrypted file if the five attempts to contact the SNAPMP from the memory buffer fail or if the retry time exceeds five minutes. If the message queue file is enabled, the password change DLL attempts to contact the SNAPMP service every five minutes to propagate the password changes that are queued in the file. The password change DLL only attempts to send the password change notification once for each five-minute period. After a password change notification is successfully sent to the SNAPMP service from the message queue file, the next password change notification in the message queue file is sent immediately and it is attempted up to five times. It is not resent for another five minutes if the fifth attempt fails or if the maximum retry time of five minutes is exceeded. |
| Reference Links | Password Change Lost if Password Change DLL Cant Contact SNAPMP |
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