Deleting an Office 365 Group Deletes your Yammer Group

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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

Connect-AzureAD

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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