### Works flawlessly in Office 365 Exchange Online only
### Connect to Exchange Online
 
$Session = New-PSSession -ConfigurationName Microsoft.Exchange `
-ConnectionUri https://outlook.office365.com/powershell-liveid/ `
-Authentication Basic -AllowRedirection -Credential patrick.gruenauer@sid-500.com
 
Import-PSSession $Session -DisableNameChecking

$welcome = Get-AcceptedDomain | Where-Object Default -EQ 'True' | 
Select-Object -ExpandProperty Name
Clear-Host 
Write-Warning "Welcome to the Office 365 Domain $welcome. You are logged in as: $user`n`
Exchange Online awaiting your commands."
''
Set-Location C:\

### Get all Mailboxes

Get-Mailbox -ResultSize Unlimited

### Disable Auto-Reply on Mailbox

Set-MailboxAutoReplyConfiguration -Identity f.huber `
-AutoReplyState Disabled 

Get-MailboxAutoReplyConfiguration -Identity f.huber |
Select-Object Identity,StartTime,EndTime,AutoreplyState

### Set Auto-Reply on User

Set-MailboxAutoReplyConfiguration -Identity f.huber `
-InternalMessage "Internal auto-reply message." `
-ExternalMessage "External auto-reply message." `
-AutoReplyState Scheduled `
-StartTime (Get-Date) `
-EndTime (Get-Date).AddDays(30)


### Retrieve Mailboxes that have Auto-Reply enabled

Get-Mailbox -ResultSize Unlimited | 
Get-MailboxAutoReplyConfiguration | 
Where-Object {$_.AutoReplyState -EQ 'Enabled' -or $_.AutoreplyState -EQ 'Scheduled'} | 
Select-Object -Property Identity,AutoreplyState,StartTime,EndTime

### Find Active Sync Users

Get-CASMailbox -ResultSize Unlimited -Filter {Name -notlike '*Discovery*' -and `
ActiveSyncEnabled -eq $true}

Get-CASMailbox -ResultSize Unlimited -Filter {HasActiveSyncDevicePartnership -eq "true"} |
Select-Object DisplayName, HasActiveSyncDevicePartnership

### List User Mailboxes by size

Get-Mailbox -RecipientTypeDetails UserMailBox -ResultSize Unlimited | 
Get-MailboxStatistics | 
Where-Object {!$_.DisconnectDate} | 
Sort-Object -Property TotalItemSize -Descending |
Select-Object DisplayName,ItemCount,TotalItemSize,LastLogonTime
#ConvertTo-Html | Set-Content c:\$home\mailboxen.htm


### List Send, SendAs permissions

Add-RecipientPermission -Identity f.huber `
-AccessRights SendAs -Trustee patrick.gruenauer -Confirm:$false

Get-Mailbox -ResultSize Unlimited | 
Get-RecipientPermission | 
Where-Object {$_.Trustee -notlike "*self*"}

### List Mailbox Permissions

Add-MailboxPermission -Identity f.huber `
-User patrick.gruenauer -AccessRights FullAccess -InheritanceType all

Get-Mailbox -ResultSize Unlimited | 
Get-MailboxPermission | 
Where-Object {($_.user.tostring() -notlike "*SELF*") `
-and ($_.user.tostring() -notlike "*S-*") `
-and $_.IsInherited -eq $false -and $_.Identity `
-notlike "*discovery*"} | 
Select-Object -Property Identity,User,AccessRights

Remove-MailboxPermission -Identity f.huber -User patrick.gruenauer `
-AccessRights FullAccess -Confirm:$false

### List Mailboxes with configured Forwarding Address

# Server Rules

Set-Mailbox -Identity f.huber -ForwardingAddress patrick.gruenauer
Set-Mailbox -Identity f.huber -ForwardingSmtpAddress patrick.gruenauer@nowhere.com

Get-Mailbox -ResultSize Unlimited `
-Filter "ForwardingAddress -like '*' -or ForwardingSmtpAddress -like '*'" | 
Select-Object Name,ForwardingAddress,ForwardingSmtpAddress

Set-Mailbox -Identity f.huber -ForwardingAddress $null
Set-Mailbox -Identity f.huber -ForwardingSmtpAddress $null

# Forwarding Rules createy by the user (Outlook)

Get-Mailbox -ResultSize Unlimited | 
Select-Object -ExpandProperty UserPrincipalName |
Foreach-Object {Get-InboxRule -Mailbox $_  | 
Where-Object {($_.redirectto -ne $null) -or ($_.forwardto -ne $null)} | 
Select-Object -Property MailboxOwnerID,Name,Enabled,From,RedirectTo,ForwardTo}

### List all rules created by the user (Outlook)

Get-Mailbox -ResultSize Unlimited | 
Select-Object -ExpandProperty UserPrincipalName |
Foreach-Object {Get-InboxRule -Mailbox $_  | 
Select-Object -Property `
MailboxOwnerID,Name,Enabled,From,Description,RedirectTo,ForwardTo}

### Show Users LastLogon Time

Get-Mailbox -RecipientTypeDetails UserMailBox `
-ResultSize Unlimited -Filter "Name -notlike '*discover*'" |
Get-MailboxStatistics | 
Sort-Object LastLogonTime -Descending |
Select-Object DisplayName, MailboxTypeDetail,LastLogonTime,TotalItemSize

### Find orphaned users

Get-Mailbox -RecipientTypeDetails UserMailBox `
-ResultSize Unlimited -Filter "Name -notlike '*discover*'" |
Get-MailboxStatistics | 
Where-Object LastLogonTime -LE (Get-Date).AddDays(-1) | 
Sort-Object LastLogonTime |
Select-Object DisplayName, MailboxTypeDetail,LastLogonTime,TotalItemSize