Office365 - Lack of Potatoes

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Office365

Code snippets and useful commands for the Office 365 PowerShell module

Extract the Immutable ID for an Office 365 user

There are many reasons why you may need this value and in my case its for Okta. Connect to O365 and substitute the username for the user required: Get-MsolUser -UserPrincipalName "username@domain.com" | Select-Object ImmutableID

Litigation Hold - Recoverable Items quota

Placing a mailbox on an indefinite hold means that mail items meeting the hold requirements will never be removed from the mailbox. This can result in the mailbox exceeding the Recoverable Items Quota, which could make the mailbox unusable or have strange errors (getting meeting invites for example). Location of

Connect to Office365

If you haven't done this already you need to install the necessary modules: Install-Module MSOnline This is the snippet of code I usually run to quickly connect to O365. function Connect-O365 { $UserCredential = Get-Credential -UserName "username@domain.eu" -Message "Username has to be in the format of username@domain.eu" $Session

Discrepancy in Outlook Desktop and OWA for Shared Mailboxes

If an incoming email is flagged with "Sensitivity: Private" then due to how Microsoft define permissions these emails won't be visible to all users in a shared mailbox. If you are not the owner of the mailbox then you need to do this via OWA. Select Open another mailbox and

Create "Room Lists" of meeting rooms in Exchange

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Build a variable with all the rooms you want to include in the list: $RoomAlias = Get-Mailbox -RecipientTypeDetails RoomMailbox -Filter {Name -like '**'} | select -ExpandProperty Alias Create new DistributionGroup as a RoomList and add your rooms as members: New-DistributionGroup -RoomList

Find user based on SIP address

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Get-ADUser -filter * -Properties msRTCSIP-PrimaryUserAddress | where msRTCSIP-PrimaryUserAddress -eq "sip:simon@domain.eu"

Re-link a mailbox to a user

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Undo-SoftDeletedMailbox -WindowsLiveID -Password (ConvertTo-SecureString -String '' -AsPlainText -Force) It's best to NOT do this and just remove the user object IF you sync your AD from on-prem as it will replace the missing info (this can result in sync

Find a user by its email Alias

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: In this example any user that has a domain.eu email addresses: Get-Mailbox -Identity * | Where-Object {$_.EmailAddresses -like 'smtp:*@domain.eu'} | Format-List Identity, EmailAddresses

Clear User photo

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Remove-UserPhoto "" -ClearMailboxPhotoRecord

Add permissions to a mailbox

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Add-MailboxPermission -Identity "" -User "" -AccessRights FullAccess -InheritanceType All

Set a shared mailbox to also store sent emails within it self

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: set-mailbox -MessageCopyForSendOnBehalfEnabled $true set-mailbox -MessageCopyForSentAsEnabled $true

Update Calendar entries to show subject and organisers name

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Set-CalendarProcessing -Identity -DeleteSubject $False -AddOrganizerToSubject $False

Set work hours/timezone for Resource Rooms

Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Set-MailboxCalendarConfiguration -Identity "" -WorkingHoursStartTime -WorkingHoursEndTime -WorkingHoursTimeZone "" Live example: Set-MailboxCalendarConfiguration -Identity "Conf Room_One" -WorkingHoursStartTime 07:00:00 -WorkingHoursEndTime 20:00:00 -WorkingHoursTimeZone "W. Europe Standard Time"

How to Permanently Remove Deleted Users from Office365

Objects will age off after 30 days but sometimes you need them gone sooner. Connect to Office 365 [https://www.lackofpotatoes.co.uk/connect-to-office365/]: Get list of users that have been removed: Get-MsolUser -ReturnDeletedUsers Remove the user/mailbox in question: Remove-MsolUser -UserPrincipalName -RemoveFromRecycleBin