Microsoft Exchange Server

Go to Dashboard > Clients and Create a new Client by clicking "Create" button
Create a Regular Web App client with any name
Go to created client details and "Connectors" tab
Select WS-Fed
Enter the following information in the respective fields.
- Realm: https://{owa-url} e.g. https://mail.example.com/owa/
- Application Callback URL: https://{owa-url} e.g. https://mail.example.com/owa/
Click to Download Certificate button and save it to your exchange server.
Save Certificate Thumbprint to somewhere as we will use it in later steps.
Add above certificate (obtained in above step) to the Trusted People store on the Exchange Server using the steps below:
- Got to Management Console. Open run dialog (Win + R) and type mmc and press enter.
- In Management Console, go to File > Add or Remove Snap-ins (Ctrl + M).
- Search for Certificates on the left side and press Add.
- In the Certificate Snap In window, select Computer account and press Next. Then select Local Computer and press Finish.
- You will see an entry for Certificates (Local Computer) in the right pane. Click OK to close the Add or Remove Snap-ins window.
- You will see a branch named Certificates created under Console Root. Expand the Certificates branch and select Trusted People.
- Right click on Trusted People > Find > Import and click on Next.
- Choose the location of the downloaded certificate file you created above and click on Next, again Next and Finish.
- You have successfully added a Signing Certificate to Trusted People. Now close Management Console and choose No on the Save data prompt.

Execute the commands below on the Exchange Server using the Exchange Management Shell.

In the below command, ##Base URL## is the exchange/OWA host. The command has both URLs: One ending in / and the other one which does not contain a trailing slash.
```
$uris=@("https://##Base URL##/owa/","https://##Base URL##/ecp/","https://##Base URL##/owa","https://##Base URL##/ecp")
```
In the below command, the ##PlusAuth Issuer## is the WS-Federation Reply URL. The ##Cert Thumbprint## is the SHA-1 Thumbprint of the certificate you downloaded. You can copy these values from PlusAuth Dashboard where we have configured WS-Fed in above steps.
```
Set-OrganizationConfig -AdfsIssuer "##PlusAuth Issuer##" -AdfsAudienceUris $uris -AdfsSignCertificateThumbprint "##Cert Thumbprint##"
```

Now we are disabling other authentication mechanisms to let PlusAuth handle it.

Get-EcpVirtualDirectory | Set-EcpVirtualDirectory -AdfsAuthentication $true -BasicAuthentication $false -DigestAuthentication $false -FormsAuthentication $false -WindowsAuthentication $false

Get-OwaVirtualDirectory | Set-OwaVirtualDirectory -AdfsAuthentication $true -BasicAuthentication $false -DigestAuthentication $false -FormsAuthentication $false -WindowsAuthentication $false -OAuthAuthentication $false

Finally, restart services to apply these changes.

# Restart w3svc and was
net stop was /y
net start w3svc

Create AD/LDAP Connection

Go to Dashboard > Connections
Create a new AD / LDAP Enterprise connection
Enter name, and select the client created above.
Fill required fields according to your AD/LDAP connection.
- Search Filter: Enter LDAP filter to find user with parameter submitted from login page. Ex. (mail={{username}})
After creating connection make it default by toggling Default Connection

You can use following command to get your AD user's all attributes. Replace ##Username## with a valid username.

get-aduser ##Username## -Properties *

Go to owa login page

Microsoft Exchange Server

Create AD/LDAP Connection

Test login