Exchange 2010 – EMC and EMS will not connect: FIXED


I have faced this problem twice now. Once on a new install which I was never able to fix and recently on an Exchange 2010 PS2 Rollup 4 uninstall.

Problem: Lost connectivity to the Exchange Management Console and the Exchange Management Shell

After uninstalling Microsoft Forefront Server Protection 2010 for Exchange Server I lost connect to the EMC and the EMS. After reviewing many Technet and Exchange forum fixes nothing worked.

Solution: Uninstall the Hub Transport role on the Exchange server.

After being unable to connect to do the troubleshooting I started to uninstall the Exchange server in pieces instead of trying to fix it. The main goal was to uninstall the Exchange 2010 server completely, upgrade the server hard drives and memory, and then reinstall new.

After uninstalling the Client Access role I was still unable to connect the EMC and the EMS. Next I uninstalled the Hub Transport role. Viola I was able to connect to the Exchange Management Console and the Exchange Management Shell. After reboot both EMC and EMS both still worked perfectly.

Something in the Hub Transport Role killed the Kerberos authentication for the Exchange Management Console and the Exchange Management Shell.

This worked for me hopefully it can help you out to. Obviously this may not be the fix for this problem for everyone but maybe it will help put you in the right direction for your needs.

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