After migration to Exchange 2013 from 2003 I seem to have transferred an email address that was attached to a public folder to a system rolegroup. The public folder was deleted and not migrated. I cannot find the email attribute in ADUC for the group but can find it using
get-adobject -filter {mail -like “helpdesk@laver.co.uk"}
CN=Help Desk,CN=Microsoft Exchange System Objects,DC=laver,DC=local
Name - Help Desk
ObjectClass - Public Folder
ObjectGUID - 400027e5-83df-4e2c-af16-64f5d32384b5
How do I remove this email address from the rolegroup (which thinks its a public folder) so I can use the SMTP address again
get-adgroup "help desk"
DistinguishedName : CN=Help Desk,OU=Microsoft Exchange Security Groups,DC=laver,DC=local
GroupCategory : Security
GroupScope : Universal
Name : Help Desk
ObjectClass : group
ObjectGUID : 730c40e8-e379-4c2c-86a9-35c7ca5adc0f
SamAccountName : Help Desk
SID : S-1-5-21-513294795-2120549601-927750060-12670