Unable to soft delete messages after installing Exchange 2010 SP2 RU6 or SP3

Finally, Microsoft has confirmed that what we wrote and many users wrote on the forums.

Namely, Microsoft admits that after installing Rollup 6 for Exchange 2010 SP2 or after the installation of Service Pack 3 for Microsoft Exchange 2010, there are problems with the removing some of e-mails using soft delete:

  1. Unable to soft delete messages that contain voice mail attachments.
  2. Unable to soft delete messages sent from FAX server, printer or scanner which have attachments (such as .PDF).
  3. issue occurs when you use Microsoft Outlook in Online mode or OWA


This issue does not happen with messages sent by a user instead of an application, or plain messages without attachments.

As workaround Microsoft recommends:

  1. Hard delete the message instead of soft deleting – to hard delete email using Microsoft Outlook, select the message and then press SHIFT+DELETE to delete it
  2. Use cached mode for Outlook – when using the cached mode of Outlook, the message can be soft deleted


All article is available here:

Unable to soft delete some messages after installing Exchange 2010 SP2 RU6 or SP3




Exchange 2010 SP2 RU6 or SP3 unable to delete email “unknown error”

Those of you who have already installed the latest Rollup for Exchange 2010 SP2 Rollup 6 or SP3 may face a problem regarding deleting emails from mailboxes.

After installing SP3 or RU6 for Exchange 2010 SP2 users can have a problem with deleting emails from inbox folder.

When you try to delete email you can receive error message: “unknown error” and, of course, email is not deleted.

A lot of users wrote on Technet Forums that this issue occurs when you try to soft delete email from inbox folder, especially when email contain an attachment such as: PDF

Interestingly the problem does not occur when you delete an email using Shift + Del or when you move this email to other folder or subfolder.

Another interesting fact is that this problem only occurs in Outlook online mode and OWA. However, in the Outlook cache mode no problems.

Unfortunately, the solution for now is to uninstall the installed updates RU6 for Exchange 2010 SP2 or uninstall SP3.

Several problems are reported to Microsoft, which confirms that receives such notification but not yet officially on the subject is not spoken.



Exchange Server 2010 SP2 Rollup 6 error: make sure enough disk space is available KB2746164

When you install Rollup 6 for Microsoft Exchange Server 2010 SP2, you can again meet with well-known problem that has performed well for Rollup 4 and Rollup 5.


However, in the latest version that is updated Rollup 6 generates a new error message:



When setup wizard checks for system requirement you can get error:

“…Check to make sure enough disk space is available….”

Of course, after checking the amount of free space on the server, it appears that there is quite a lot, so what caused this error?

As usual, the problem are installed updates:

  • KB2506143 – for Windows 7 SP1 and Windows Server 2008 R2 SP1
  • KB2506146 – for Windows Server 2008 SP2


We have already written about them many times and the problems they caused during the installation of Rollup 4 and Rollup 5 for Exchange Server 2010 SP2.

However, this time we write about them again because of the new specific error message about the problem when you install Rollup 6 for Exchange 2010 SP2.

Of course, there is one solution:

uninstall both updates and re-install Rollup 6