DOCUMENT:Q181450 31-OCT-1999 [exchange] TITLE :XADM: Advanced Security Revocation Not Immediate PRODUCT :Microsoft Exchange PROD/VER:winnt:4.0,5.0,5.5 OPER/SYS: KEYWORDS:kbusage exc4 exc5 exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 ------------------------------------------------------------------------------- SUMMARY ======= When advanced security is revoked for a Microsoft Exchange user, the effect of this on the user's ability to send sealed or signed messages is not immediate. It can take up to 24 hours for all clients to become aware that advanced security was revoked for the user. MORE INFORMATION ================ When advanced security is revoked for a user, that user's certificate is added to the Certificate Revocation List (CRL). For performance reasons and to enable offline use, the CRL is cached on the client computer and expires every 24 hours. Therefore, it could take up to 24 hours for the clients to become aware of the CRL change. After clients are aware of the change to the CRL, they will not allow signed or sealed messages to be sent to the user in question. The user in question also will not be able to send signed or sealed messages. If a user certificate has been compromised, it is recommended that the Microsoft Exchange Administrator disable and then re-enable advanced security for the user in question. This will generate a new token that should be given to the user. If an administrator wants to remove security from a user permanently, for example when an employee has left the company on bad terms, it may be better to delete the mailbox. Additional query words: ====================================================================== Keywords : kbusage exc4 exc5 exc55 Technology : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2 Version : winnt:4.0,5.0,5.5 Issue type : kbinfo ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.