How do I show the value of LastLogonTime from a mailbox query - powershell

Question

How can I show the value of the attribute LastLogonTime?
function Get-MailboxesNotLoggedOnTo {
param(
[int]$days = 90
)
$mailboxes = Get-Mailbox -ResultSize 500
$mailboxes | Where-Object {
(Get-MailboxStatistics $_).LastLogonTime -and
(Get-MailboxStatistics $_).LastLogonTime -le (Get-Date).AddDays(-$days)
} | FT DisplayName, Alias, ServerName, LastLogonTime
}

Answer 1

This is happening because Get-Mailbox does not return a property called LastLogonTime. Get-MailboxStatistics does. What you need to do is add the timestamp as a property of your output
$mailboxes = Get-Mailbox -ResultSize 200
$mailboxes | Where-Object {
(Get-MailboxStatistics $_).LastLogonTime -and
(Get-MailboxStatistics $_).LastLogonTime -le (Get-Date).AddDays(-$days)
} | ForEach-Object {Add-Member -InputObject $_ -MemberType NoteProperty -Name LastLogonTime -Value (Get-MailboxStatistics $_).LastLogonTime -PassThru} |
Select DisplayName, Alias, ServerName, LastLogonTime
Using Add-Member we can fill in the missing piece. The one issue I have with this is the multiple calls to Get-MailboxStatistics which im working on improving now. Should be something closer to this.
$checkDate = (Get-Date).AddDays(-90)
$mailboxes = Get-Mailbox -ResultSize 200
$mailboxes | ForEach-Object{
$stats = Get-MailboxStatistics $_
If ($stats.LastLogonTime -and ($stats.LastLogonTime -le $checkDate)){
Add-Member -InputObject $_ -MemberType NoteProperty -Name LastLogonTime -Value $stats.LastLogonTime -PassThru
}
} | Select DisplayName, Alias, ServerName, LastLogonTime
The extra calls to Get-MailboxStatistics would make it slower. Reduced the call to only the one. Still using Add-Member with -PassThru which just pipes out to a select statement. This should be a more efficient approach.