Office 365 - convert a deleted mailbox to a inactive mailbox

In Office 365 you can convert mailboxes for old employees to inactive mailboxes. This will preserver the mailbox in Office 365 (and can later be connected and/or searched with eDiscovery).
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• Put an active mailbox on LitigationHold
  Set-Mailbox rikardst -LitigationHoldEnabled $true
  
• Remove LitigationHold
  Set-Mailbox rikardst -LitigationHoldEnabled $false
• Convert a deleted mailbox to inactive (put it on LitigationHold)
• First assign a license to the user
• Then put it on LitigationHold
  Set-Mailbox rikardst -LitigationHoldEnabled $true
• Wait 60 minutes
• Remove license
  

You cannot place LitigationHold on a deleted object (thats why you need to assign a license first).



Links

• Manage inactive mailboxes in Exchange Online