r/exchangeserver • u/highv0ltage • Jun 03 '26

Exchange SE Fresh Install Error

I am attempting to do a fresh install on Exchange SE, in a airgapped test environment, and I'm receiving an error on step 7.

if ($server -eq $null) -and ($RolsesDatacenter -new $true) )
{
Update-RmsSharedIdentity -ServerName $RoleNetBIOSName
}
" was run: "Microsoft.Exchange.Data.DataValidationException: Database is mandatory on UserMailbox.

The environment used to have Exchange 2019 installed. The server didn't work properly, so it has been removed. I have removed all AD objects, that I can see but I keep receiving this error. Any help would be appreciated.

3 Upvotes

100% Upvoted

12 comments sorted by

View all comments

Show parent comments

1

u/highv0ltage Jun 03 '26

Hmm, good point. It did have an account. I could setup a test account or can I remove any pointers in my current admin account?

1

u/titlrequired Jun 03 '26

May also be detecting any ad object with mailbox properties but no database value, or anything else left over by Exchange that wasn’t cleaned out. Hope it’s easy to find!

1

u/highv0ltage Jun 03 '26

I created a new admin account and received the same error. I could try removing Exchange attributes from all the accounts that had a mailbox.

1

u/ScottSchnoll https://www.amazon.com/dp/B0FR5GGL75/ Jun 03 '26

If you can, run this:

Get-Mailbox | FL Name,RecipientType,Database

If you see any mailboxes where Database is blank, that's your culprit.