Broken Exchange in AD Environment

Question

One of our testing exchange servers hadn't been used for awhile and when a tech was trying to get it working again (hub transport wouldn't start, SID errors in event log, etc.) he got frustrated and deleted the computer account. We then created a new VM and attempted to install Exchange 2013 on a server 2012 R2. It completed but said that it cannot contact IIS on the (older and now removed) exchange server to load the OAB.

Here is the exact message:

How can we properly remove the previous exchange information from our domain and install a totally fresh exchange instance?

Is this the only exchange server on the domain? Clearing up one server and clearing all exchange information is different — Drifter104, Jul 28 '15 at 21:00

score 2 · Accepted Answer · answered Jul 28 '15 at 21:25

You can clean up the exchange information using adsi edit.

Open ADSI Edit to here CN=Configuration,DC=DOMAIN,DC=LOCAL,CN=Servicesand delete

CN=Microsoft Exchange
CN=Microsoft Exchange Autodiscover

Browse to CN=Default naming context,DC=DOMAIN,DC=LOCAL and delete

CN=Microsoft Exchange Security Groups
CN=Microsoft Exchange Security Objects

Delete the install folder from C:\Program Files\Microsoft\Exchange Server

Delete the IIS sites

Delete the following user accounts from active directory

DiscoverySearch Mailbox{GUID}
Exchange Online-ApplicationAccount
FederatedEmail.GUID
Migration.GUID
SystemMailbox{GUID}
HealthMailboxGUID

In the registry find HKLM\Software\Microsoft and delete ExchangeServer also find HKLM\CurrentControlSet\Services and delete MSExchange

You will also need to run the prepare ad command on install

Broken Exchange in AD Environment

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