Forum Discussion

JonnyShaw1's avatar
JonnyShaw1
Copper Contributor
Apr 27, 2026

Exchange 2016 Decommission

Hi all, I am trying to decom my 2016 environment and cannot disable (Disable-Mailbox) the final 16 mailboxes (out of thousands). Am getting the error  Active directory response: 00002098: SecErr: D...
2016
admin
Exchange Server
AnnTaeYoun's avatar
AnnTaeYoun
MVP
Apr 28, 2026

JonnyShaw1​ 

If it is a protected account, use the command below!

Get-ADUser <User> -Properties adminCount

Set-ADUser <User> -Replace @{adminCount=0}

Disable-Mailbox <User>

 

ADUC -> <User Account> -> Security -> Advanced

Enable inheritance <Check>

 

Thanks

TaeYoun

JonnyShaw1's avatar
JonnyShaw1
Copper Contributor
Apr 29, 2026

Hi,

Thanks for the reply. It was not a protected account. I had tried all that.

It is now resolved though through editing the MSexch attributes. Dirty but as doing a decom it doesn't matter :)

Thanks

Jon