Deleting an Office 365 Group Deletes your Yammer Group

Even if the Yammer Group was created first... So yeah, don't delete O365 Groups unless you want everything gone.

If you need to recover:

##Do this off Network with regular powershell opened as Administrator

Import-Module AzureADPreview


Get-AzureADMSDeletedGroup | Out-GridView

Restore-AzureADMSDeletedDirectoryObject –Id xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Get-AzureADGroup –ObjectId xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Update - 08/12/2017
Microsoft are rolling this restore functionality into Exchange Online over the next month or two, so you wont need the script above soon:


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