Set mail attribute in SharePoint Task List "107"

Question

We recently migrated to SharePoint 2010 from 2007.  During the migration on all task lists the
List Settings > Advanced Settings > "Send e-mail when ownership is assigned" radio button got switched to "No" if it was set to "Yes".
 I need to have this switched back to "Yes" on all task lists but have no idea how many of these lists are out there or what their URL may be.  I think I found the attribute that needs to be set...
# Send e-mail when ownership is assigned?
$list.EnableAssignToEmail = $true
I need a script that would query each of the 3 site collections we have for tasks list which I believe is 
$listTemplate = "107" #Tasks List
and then set the radio button List Settings > Advanced Settings > "Send e-mail when ownership is assigned" to "Yes".  Any help would
be immensely appreciated.

Answer 1

Updating all Task lists is a bit dangerous as there are SharePoint created Task lists like "Workflow Tasks".
Step 1 is to make sure your PowerShell is selecting the correct task lists. Maybe something like:
Get-SPSite -Limit All |
Get-SPWeb -Limit All |
Select -ExpandProperty Lists |
Where {$_.BaseTemplate -EQ "Tasks" -AND -NOT $_.Hidden -AND -NOT ($_.Title
-EQ "Workflow Tasks") } |
Select Title, BaseTemplate, ParentWebUrl, EnableAssignToEmail
Once you are confident that you have found the correct task lists then you could use something like:
Get-SPSite -Limit All |
Get-SPWeb -Limit All |
Select -ExpandProperty Lists |
Where {$_.BaseTemplate -EQ "Tasks" -AND -NOT $_.Hidden -AND -NOT ($_.Title -EQ "Workflow Tasks") } |
foreach { $_.EnableAssignToEmail = $true; $_.Update() }
BUT... again be very carful to make sure you are only updating the correct task lists!
Mike Smith TechTrainingNotes.blogspot.com