we have one shared mailbox with 100+ automapped profiles, how can we clear this with powershell

Here is code for a script, keep in mind, in order to turn off automapping you have to remove full access for each account first, then add it back.  I provided for the fact that there may be additional permissions, but of course, test to make sure this will work for you, because it will basically take all users who have full access rights on that mailbox and remove and add back.

$users = get-mailboxpermission -identity [exchange_service_account] | ? { $_.AccessRights -like "*FullAccess*"} | select User,AccessRights
$users | % { Remove-MailboxPermission -Identity [exchange_service_account] -User $_.User -AccessRights FullAccess -Confirm:$false }
$users | % { add-mailboxpermission -Identity [exchange_service_account] -User $_.User -AccessRights $_.AccessRights -Automapping $false

Select allOpen in new window

hi Dsuyemoto - just looking at your script now

lets call the service account svc-exch  

when I log into "svc-exch" there are hundreds of profiles mapped, since this account was set to have full access on many accounts and automap set to $true

the script you provided shows what mailboxes have full access to svc-exch  .. the other way around.

I need to unmap hundreds of accounts that svc-exch has an automap setup with.

Hi,
Please have a look at the below URL.
http://markgossa.blogspot.se/2015/10/exchange-2013-remove-outlook-automapping.html

Thanks

hi dsuyemoto - when I run your script with the -whatIF   - this is the only output I am seeing [multiple entries]

domain.com/Accounts/Users/Employees/J, SMITH isn't a mailbox user.
    + CategoryInfo          : InvalidData: (:) [Get-MailboxPermission], ManagementObjectNotFoundException
    + FullyQualifiedErrorId : FB165A7F,Microsoft.Exchange.Management.RecipientTasks.GetMailboxPermission

Select allOpen in new window

Try using RemoveAutoMap(get-mailbox) instead.

thanks dsuyemoto, where can I add the -resultsize unlimited parameter? otherwise looks good!

thx dsuyemoto - exactly what we were looking for.

thanks dsuyemoto, where can I add the -resultsize unlimited parameter? otherwise looks good!

You can just do RemoveAutoMap(get-mailbox -resultsize 1000)