Uninstall Exchange Server 2010 SP3 Rollup 8 requires msexchange.msi

Having been caught with an SBS 2011 server that had the Exchange Server 2010 Service Pack 3 Rollup 8 loaded, just before Microsoft withdrew that update. Apparently it caused connection problems with Outlook clients, although we had no reported issues.

Before you start make sure you've downloaded Exchange 2010 Service Pack 3 and run it, so that its unpacked in a handy directory.

Going into Control Panel > Programs > View Installed Updates, you should see Exchange 2010 SP3 Rollup 7 and Rollup 8.

Select and uninstall Rollup 8. It takes a while to complete but will prompt for the location of msexchange.msi. This is actually the original  SP3 installer, not anything to do with RU7 which is what you'd expect. So when it prompts, browse to the SP3 directory mentioned above, where you already unpacked the files, and choose that msi file.

The RU8 will uninstall and appear to leave RU7 on the updates list, however in reality your Exchange server is now all the way back at SP3 with no Rollups at all.

Reinstall Exchange 2010 SP3 RU7 to bring it back up to date - and wait for MS to reissue RU8.

Bad week for faulty updates!

IE 9 won't open or save attachment in OWA webmail on SBS

That new locked down IE9 is giving me hell on the SBS servers. Latest was to stop me saving a licence file on a remote server I was logged into. No errors, just wouldn't open or save or save as.

Messed with security xones, trusted certificates, activex filtering

Found the answer on Andy Grogan's blog

Internet Explorer > Internet Options > Advanced

scroll most of the way down the list, and untick this option

Do not save encrypted pages to disk option

SBS 2011 undeliverable local email after migration, 0x8004010F

Just completed an SBS 2011 migration from SBS 2003 using the Microsoft method. Two of the mailboxes failed to transfer correctly and I had to manually create and import them. Subsequently some staff were unable to email one of those mail accounts.

They received an undeliverable error which showed the new server name but trying to route to the old 'First Administrative Group' on the 2003 server. Download Offline Address Book gave error 0x8004010F, not found.

Creating a new OAB in 2010 Exchange Management Console didn't appear to fix the problem. Found the key bit of info here
http://forums.msexchange.org/fb.aspx?m=1800473258
Create the new OAB with a different name. Then allocate it to the Mailbox Database. Going back to Outlook and clicking Download Address Book worked straight off and email routing was successful.