If you administer an Office365/Exchange Online organization, you might have noticed you cannot modify Full Access/Send As permissions from the web console. You need to change these permissions through PowerShell; here are the required steps:
The first time you do this, make sure the following steps have been completed:
1. Right click and run PowerShell as Administrator(Start->Programs-> Accessories->Windows PowerShell->Windows PowerShell) on your local PC
2. Verify you are running PowerShell 2.0 – Enter $PSVersionTable in the prompt and hit enter
3. Allow execution of scripts by entering the following command: Set-ExecutionPolicy Unrestricted
Once those two steps have been completed, you can start from here:
1. Enter the following command and input your Exchange admin credentials when prompted:
$LiveCred = Get-Credential
2. Once completed, enter this command next:
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $LiveCred -Authentication Basic -AllowRedirection
3. Next, enter the following command to import server-side commands:
Import-PSSession $Session
4. To allow user BossOne to have full access to user WorkerOne, enter the following command:
Add-MailboxPermission -Identity “WorkerOne” -User BossOne -AccessRights FullAccess
5. Verify your work with:
Get-MailboxPermission Username
6. Once completed, discconect from the remote session with:
Remove-PSSession $Session
**If you also need to add “SendAs” permissions, the command is:
Add-RecipientPermission “mailboxuser” -AccessRights SendAs -Trustee “user”
Verification command is:
Get-RecipientPermission Username
DANIEL KUCHENSKI 