Quick Tip: Fix “Enable Web-based distribution” greyed out in offline address book
After upgrading from Microsoft Exchange 2003 to Exchange 2007 or 2010 you might notice that the "Enable Web-based distribution" option is greyed out. The first thing to check is if you have moved the Offline Address Book generation to an Exchange 2007/2010 server.
However if you have already done this and the option is still disabled it can easily fixed by running ApplyMandatoryProperties on it. This can be done by running the below powershell command
Get-OfflineAddressBook | Set-OfflineAddressBook -ApplyMandatoryProperties
Et voila! you can now "Enable Web-based distribution"
Exchange 2010 SP1 fails with: Setup previously failed while performing the action “Uninstall”.
While installing Microsoft Exchange 2010 SP1, the setup might fail with the following error
Setup previously failed while performing the action "Uninstall". You can't resume setup by performing the action "BuildToBuildUpgrade".
The error will look like the below depending if you are using the GUI or CLI


To solve this problem you will need to edit the registry using regedit tool
Disclaimer: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. ZeroHourSleep cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.
Outlook Web Access did not initialize error on Exchange 2007 SP1 after installation of Rollup 5
Installing the rollup update 5 on a machine running Microsoft Exchange 2007 SP1 might cause your Outlook Web Access, OWA, to fail with error Outlook Web Access did not initialize
I have already experienced this error at 2 of my customers on fresh installations and I am surprised I didn't find this error documented at Microsoft (Maybe I didn't look hard enough)
The problem is that, for some weird reason, the installation of the rollup update 5 is removing the Exchange server from the Exchange Domain Servers group !
So if you are facing this issue simply find that group, add your exchange server account to it and restart your server. That should do it!
Lync 2010 Active Directory References and how to remove them
I have been asked lately several times about Active Directory references for lync 2010 and how to remove them, in this respect i have decided to share this interesting post from Randy's Wintle blog which discuss in details these references and how to remove them. check it here
cheers,

