You need an administrator account for the tenant.
1
Open the Microsoft 365 admin center
Go to portal.microsoft.com and log in with an
administrator account.
2
Go to integrated apps
On the left-hand menu, click Settings and then select Integrated apps.
3
Browse available add-ins
Click Get apps.
4
Find the add-in
In the search bar, type
OutKept Phishing Reporter and click the search icon. When it
appears in the results, click Get it now.5
Assign it to everyone
Under Assign users, select Entire organization. Click Next.
6
Finish the deployment
Review the deployment settings and, if everything looks correct, click Finish
deployment.
If users do not see the add-in immediately, they may need to restart their Outlook client or
wait a few minutes for it to appear.
Narrower rollouts
The same Assign users step offers two other options, useful for a phased rollout:
There is also an Is this a test deployment? toggle on that screen, and an optional email
notification to assigned users.

