A Restart from a Previous Installation is Pending

Another Exchange 2010 Installation with some Pre-Requisite check items and the following error is encountered... " A Restart from a Previous Installation is Pending "

This seems to occur when Windows Updates do not close out updates properly and when using Server Manager to automate the load of Exchange 2010 pre-reqs.

Microsoft Exchange Server setup cannot continue because a restart from a previous installation or update is pending.

The Exchange Server Analyzer reads the following registry key to determine whether a system restart is required after installation or removal of a software update such as a security update, critical update, or hotfix.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\UpdateExeVolatile

The Exchange Analyzer also checks the following registry key to determine whether a previous software update installation was not completed and the system must be restarted to finish the installation.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations

** Note: The above is most common - just delete the contents of the key and "retry" the Exchange 2010 Setup process.


The Exchange Analyzer displays an error message if one of the following conditions is true:.

• The value of the UpdateExeVolatile registry key is anything other than 0.
  
• The PendingFileRenameOperations registry key has any value.

To delete the orphaned PendingFileRenameOperations registry key

1. Open a registry editor, such as Regedit.exe or Regedt32.exe.
   
2. Navigate to HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\
   
3. In the right navigation pane, right-click the PendingFileRenameOperations key and select Delete.
   
4. Close Registry Editor.

See original TECHNET Link for additional information:

http://technet.microsoft.com/en-us/library/cc164360%28v=exchg.80%29.aspx

The source server is currently rejecting replication requests

I got this error while troubleshooting an environment with two DC’s that were not replicating. This error popped up when I tried to manually replicate in AD sites and services.

I used the repadmin tool to troubleshoot and found that the server had replication turned off.

Repadmin /option *servername* -- this will show you what the current settings are for the DC in question.

Enabling replication resolved the issue, here is the syntax

Use both:

repadmin /options *servername* -disable_inbound_repl

repadmin /options *servername* -disable_outbound_repl

Uninstall Exchange 2007 SP1 Mailbox role from Server 2008 R2

If you are getting error:
"An error occurred. The error code was 3221685466. The message was The service is already registered.." while trying to uninstall Exchange 2007 SP1 Mailbox role from Server 2008 R2

Try changing registry key value from "Uninstall" to "Install" located at
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\v8.0\Mailbox\
after that try uninstalling again.

Your mileage may vary -- so far it's worked 5 out of 6 tries for us.