Office 365 exchange server management commands

Connect to 365

$UserCredential = Get-Credential

$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection

Import-PSSession $Session

Connect-MsolService
Get-MsolUser
Get-MsolUser | select UserPrincipalName, ValidationStatus, IsLicensed, BlockCredential, StrongPasswordRequired, PasswordNeverExpires | ft

You may require below. I’m running Win10 64-bit and I needed below.

Microsoft Online Services Sign-in Assistant for IT Professionals RTW.
http://go.microsoft.com/fwlink/p/?LinkId=286152

Windows Azure Active Directory Module for Windows PowerShell (64-bit version)
http://go.microsoft.com/fwlink/p/?linkid=236297

 

Enable script (ExecutionPolicy)

Set-ExecutionPolicy Unrestricted 
or 
Set-ExecutionPolicy RemoteSigned

 

Set password never expires

Get-MsolUser -UserPrincipalName xxx@xxx.com.sg | fl
Set-MsolUser -UserPrincipalName xxx@xxx.com.sg -PasswordNeverExpires $true
#Apply to all users
Get-MsolUser | Set-MsolUser -PasswordNeverExpires $True

 

Set strong password false

Get-MSOLUser | Select UserPrincipalName, PasswordNeverExpires, StrongPasswordRequired
Get-MsolUser | Set-MsolUser -StrongPasswordRequired $false

 

Set user password

Set-MsolUserPassword –UserPrincipalName xxx@xxx.com.sg –NewPassword xxx -ForceChangePassword $False

 

Change Principal Name (to set password same as username)

Set-MsolUserPrincipalName -UserPrincipalName abc@xxx.com.sg -NewUserPrincipalName abcc@xxx.com.sg

Set-MsolUserPassword –UserPrincipalName abcc@xxx.com.sg –NewPassword "abc" -ForceChangePassword $False

Set-MsolUserPrincipalName -UserPrincipalName abcc@xxx.com.sg -NewUserPrincipalName abc@xxx.com.sg

 

Remove immutable id

Set-MsolUser -UserPrincipalName "xyz@xxx.com.sg" -ImmutableId $null

Mailbox size

Find out mailbox size for 1 user

 Get-MailboxStatistics kim | fl DisplayName, TotalItemSize

Find out mailbox size for each user sorted in MB

Get-Mailbox -ResultSize Unlimited | Get-MailboxStatistics | select DisplayName, @{name="TotalItemSize (MB)"; expression={[math]::Round(($_.TotalItemSize.ToString().Split("(")[1].Split(" ")[0].Replace(",","")/1MB),2)}}, ItemCount | Sort "TotalItemSize (MB)"

Find out mailbox size for each user sorted in GB

Get-Mailbox -ResultSize Unlimited | Get-MailboxStatistics | select DisplayName, @{name="TotalItemSize (GB)"; expression={[math]::Round(($_.TotalItemSize.ToString().Split("(")[1].Split(" ")[0].Replace(",","")/1GB),2)}}, ItemCount | Sort "TotalItemSize (GB)"

 

Find big items from each mailbox

Get-Mailbox -ResultSize Unlimited | Get-MailboxFolderStatistics -IncludeAnalysis -FolderScope All | Where-Object {$_.TopSubjectSize -gt 19MB} | Select-Object Identity, TopSubject, TopSubjectSize | Export-CSV -path "C:\report.csv" -notype

 

Get mailbox folder statistics

Get-MailboxFolderStatistics kim | select identity, itemsinfolder

 

Disable POP & IMAP

Get-CASMailbox
Get-CASMailbox | select DisplayName, PopEnabled, ImapEnabled
Get-CASMailbox | select DisplayName, PopEnabled, ImapEnabled, MAPIEnabled, OWAEnabled, ActiveSyncEnabled, EwsEnabled | ft

Disable POP & IMAP for all mailbox

Get-Mailbox | Set-CASMailbox –POPEnabled $False
Get-Mailbox | Set-CASMailbox -ImapEnabled $false

 

Disable ActiveSync for a user

Get-Mailbox Kim | Set-CASMailbox -ActiveSyncEnabled $true

#Check changes
Get-CASMailbox -Identity Kim

Get/Set mailbox size limits

Get-Mailbox kim | select ProhibitSendQuota, ProhibitSendReceiveQuota, IssueWarningQuota
Get-Mailbox | select Name, ProhibitSendQuota, ProhibitSendReceiveQuota, IssueWarningQuota

Set mailbox size limits for a single user

Set-Mailbox kim -ProhibitSendQuota 19GB -ProhibitSendReceiveQuota 20GB -IssueWarningQuota 15GB

Set mailbox size for all

Get-Mailbox | Set-Mailbox -ProhibitSendQuota 49GB -ProhibitSendReceiveQuota 50GB -IssueWarningQuota 45GB

 

Purge deleted users

#Look for deleted users
Get-MsolUser -ReturnDeletedUsers

#Delete single user (Same as using GUI) 
Remove-MsolUser -UserPrinciplalName xxx@xxx.com.sg

#Purge single deleted user 
Remove-MsolUser -RemoveFromRecycleBin -UserPrincipalName xxx@xxx.com.sg

#Purge all deleted users 
Get-MsolUser -ReturnDeletedUsers | Remove-MsolUser -RemoveFromRecycleBin -Force

 

Disable Clutter

Direct link to disable Clutter from end user running Office 365

https://outlook.office365.com/owa/#path=/options/clutter

 

 

Purge RecoverableItems

#Delete 
Search-Mailbox kim -SearchDumpsterOnly -DeleteContent -Force

#Check after delete
Get-MailboxFolderStatistics -Identity "Kim" -FolderScope RecoverableItems | Format-Table Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders -Auto

Adding admin account to Discovery Management is required.
Discovery Management requires roles: Legal HoldMailbox Import ExportMailbox Search

 

Full step to purge

# Get Deleted item retention period
Get-Mailbox kim | FL SingleItemRecoveryEnabled,RetainDeletedItemsFor

# Get access setting
Get-CASMailbox Kim | FL EwsEnabled,ActiveSyncEnabled,MAPIEnabled,OWAEnabled,ImapEnabled,PopEnabled

# Check if any retention policies applied
Get-Mailbox Kim | FL LitigationHoldEnabled,InPlaceHolds
Get-OrganizationConfig | FL InPlaceHolds

# Current size & total items in Recoverable 
Get-MailboxFolderStatistics Kim -FolderScope RecoverableItems | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

# Current size & total items in Recoverable (Archived)
Get-MailboxFolderStatistics Kim -FolderScope RecoverableItems -Archive | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

# Disable mailbox
Set-CASMailbox Kim -EwsEnabled $false -ActiveSyncEnabled $false -MAPIEnabled $false -OWAEnabled $false -ImapEnabled $false -PopEnabled $false

# Set desired retention period (1 day or 30 days)
Set-Mailbox Kim -RetainDeletedItemsFor 1

# Remove Litigation Hold
Set-Mailbox Kim -LitigationHoldEnabled $false

# Purge
Search-Mailbox Kim -SearchQuery size>0 -SearchDumpsterOnly -DeleteContent



# Verify that items were deleted
Get-MailboxFolderStatistics Kim -FolderScope RecoverableItems | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

# Verify that items were deleted (in Archive)
Get-MailboxFolderStatistics Kim -FolderScope RecoverableItems -Archive | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

View your  RecoverableItems in Mailbox & Archive

# Mailbox
Get-MailboxFolderStatistics kim -FolderScope RecoverableItems | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

# Archive
Get-MailboxFolderStatistics kim -FolderScope RecoverableItems -Archive | FL Name,FolderAndSubfolderSize,ItemsInFolderAndSubfolders

# Purge 
Search-Mailbox kim -SearchQuery size>0 -SearchDumpsterOnly -DeleteContent

 

 

Increase DefaultPublicFolder size limit

#Get DefaultPublicFolder value
Get-OrganizationConfig | fl *DefaultPublicFolder*

#5GB
Set-OrganizationConfig -DefaultPublicFolderProhibitPostQuota 5368709120

#10GB 
Set-OrganizationConfig -DefaultPublicFolderProhibitPostQuota 10737418240

 

Increase security by using SPF

Add DNS record

v=spf1 ip4:115.xxx.xx.xx ip4:202.xx.xx.xx ip4:xx.xx.xx.xx include:spf.protection.outlook.com -all

Specify IP address ranges using CIDR notation

v=spf1 ip4:202.168.0.1/26 include:spf.protection.outlook.com -all

Moving OST in Outlook 2010

Control Panel > Mail > E-mail Account settings > Exchange server account > Advanced tab > Disable Cached > Apply > Offline Folders File Settings > Disable Offline Use > Press OK on warning pops-up > Offline Folders File Settings > browse to new OST location > Enable Cache

Increase Outlook rules quota

Get-InboxRule -Mailbox kim
Get-Mailbox -Identity kim | ft *rulesquota*, PrimarySmtpAddress
Set-Mailbox -Identity kim -RulesQuota 256KB

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