Pretty much anyone who has upgraded a 5.5 server to E2K has probably encountered the zombie user phenomenon. Error log event 9551 is likely familiar. The reason behind these errors has to do with w...
Updated Jul 01, 2019
Version 2.0
Blog Post
As long as you are not potentially generating new zombies by adding or modifying users and groups on the 5.5 side, you can try this:
- Set the "Ignore zombie users" reg value to true (see KB:324323 for details).
- If you are experiencing these on public folders, force ACL upgrades on all public folders by walking them and accessing the ACL's. PFDAVAdmin can do this. See http://blogs.msdn.com/exchange/archive/2004/11/05/252979.aspx.
- If these are occurring on private mailboxes, you are on you own for a tool that will walk all the folders in all the mailboxes.
- Set the reg value back to false.
You don’t want to leave this value on forever because dropping zombies could result in security holes under the right set of circumstances and some users may get additional access they weren’t supposed to have. But if you’re desperate to be rid of them, it’s something you can do.
- Set the "Ignore zombie users" reg value to true (see KB:324323 for details).
- If you are experiencing these on public folders, force ACL upgrades on all public folders by walking them and accessing the ACL's. PFDAVAdmin can do this. See http://blogs.msdn.com/exchange/archive/2004/11/05/252979.aspx.
- If these are occurring on private mailboxes, you are on you own for a tool that will walk all the folders in all the mailboxes.
- Set the reg value back to false.
You don’t want to leave this value on forever because dropping zombies could result in security holes under the right set of circumstances and some users may get additional access they weren’t supposed to have. But if you’re desperate to be rid of them, it’s something you can do.