Scenario
You'd like to find out more about how the Exclaimer Outlook Add-In connects to the internet to download signatures. You have a restrictive firewall policy and need to whitelist the URLs used by the Add-In.
Resolution
The Exclaimer Outlook Add-In uses the following URLs - please add these to your firewall allow/exceptions list to ensure that the Exclaimer Outlook Add-In can connect successfully:
| URL | Purpose |
|---|---|
| login.microsoftonline.com | Used to authenticate to Azure. |
| secure.aadcdn.microsoftonline-p.com | Used to authenticate to Azure. |
|
<region code>.outlooksignatures.exclaimer.net (Where <region code> is replaced with the region code for the subscription, see: How to check your region code) |
Used to download signature data. |
|
appsforoffice.microsoft.com/lib/1.1/hosted/office.js |
Runtime support. |
|
static2.sharepointonline.com/files/fabric/office-ui-fabric-core/9.6.1/css/fabric.min.css |
CSS for the display of the add-in user interface. |
|
pro.fontawesome.com/releases/v5.10.0/css/all.css |
CSS for the display of the add-in user interface. |
| outlookclient.exclaimer.net
|
Used for essential metadata, configuration settings, and permissions that define the Add-ins behavior, deployment, and integration with Office 365 services. |
WARNING! Make sure you are aware of your region code before you add the exceptions. You need to enter the 'region code' to populate the URL correctly:
Region code
AU Australia
CA Canada
DE Germany
EU Europe
UAE UAE
UK United Kingdom
US United States
Region code
AU Australia
CA Canada
DE Germany
EU Europe
UAE UAE
UK United Kingdom
US United States
NOTE: All connections are on port 443.