This update is no longer available. To fix the issues that are described in this article, install the latest Microsoft Exchange Server update from the following Microsoft Docs article:
Microsoft provides download files only for N-2 versions for an Exchange Server cumulative update (CU), where "N" is the latest CU. The latest CU can be used to recover servers that are running Exchange Server. This includes servers that have a previous CU installed.
- When you try to open the item, you receive the following error message:Can’t open this item.
- When you try to delete the item again, you receive the following error message:Unknown error.
- When you click the destination folder, and then go back to the source folder, the item disappears in the source folder.