Grand permission for on prem public folder or shared mailbox to office 365 users

First create universal group and add users to the group the mail enable it

With the following command from the exchange PowerShell

Enable-DistributionGroup -Identity “groupName”

After its enabled

Run the following command

send on behalf off

(run the command from the exchange powershell)

Set-MailPublicFolder “\publicfoldername” -GrantSendOnBehalfTo “Groupname”

send as

For the send as go to properties of the distribution  group from the ECP schange link then go to delivery options

Add the group


Use your Office 365 credentials to sign in to Yammer

Use your Office 365 credentials to sign in to Yammer



Office 365 sign-in for Yammer

Use your Office 365 credentials to sign in to Yammer

Go to your office 365 admin center

Then choose SharePoint





This is the situation now before enabling the feature there is now office 365 log in


SharePoint admin center

And check the Use Yammer.comService radio button


Now you can go to yammer website

change the company name with your domain name

And then go to network Admin



Now the option is there


Check the enforce office 365 identity in yammer

Make sure to notify users cause all users will be logged out and they will have to re login again using the office 365 account



After you accept you will have a new option for blocking users how don’t have yammer license